51101010 has 64 divisors (see below), whose sum is σ = 138879360. Its totient is φ = 13366080.

The previous prime is 51101003. The next prime is 51101023. The reversal of 51101010 is 1010115.

It is a super-2 number, since 2×51101010² = 5222626446040200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51100983 and 51101001.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12525 + ... + 16095.

It is an arithmetic number, because the mean of its divisors is an integer number (2169990).

Almost surely, 2^51101010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51101010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69439680).

51101010 is an abundant number, since it is smaller than the sum of its proper divisors (87778350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51101010 is a wasteful number, since it uses less digits than its factorization.

51101010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640 (or 3634 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 9.

The square root of 51101010 is about 7148.4970448340. The cubic root of 51101010 is about 371.0876445481.

Adding to 51101010 its reverse (1010115), we get a palindrome (52111125).

The spelling of 51101010 in words is "fifty-one million, one hundred one thousand, ten".