51514540 has 72 divisors (see below), whose sum is σ = 135940896. Its totient is φ = 16051200.

The previous prime is 51514537. The next prime is 51514543. The reversal of 51514540 is 4541515.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51514537) and next prime (51514543).

It is not an unprimeable number, because it can be changed into a prime (51514543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15420 + ... + 18460.

It is an arithmetic number, because the mean of its divisors is an integer number (1888068).

Almost surely, 2^51514540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51514540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67970448).

51514540 is an abundant number, since it is smaller than the sum of its proper divisors (84426356).

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

51514540 is a wasteful number, since it uses less digits than its factorization.

51514540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079 (or 3066 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 51514540 is about 7177.3630255129. The cubic root of 51514540 is about 372.0859534685.

The spelling of 51514540 in words is "fifty-one million, five hundred fourteen thousand, five hundred forty".