51814380 has 48 divisors (see below), whose sum is σ = 147135744. Its totient is φ = 13621440.

The previous prime is 51814369. The next prime is 51814381. The reversal of 51814380 is 8341815.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (51814381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1822 + ... + 10341.

It is an arithmetic number, because the mean of its divisors is an integer number (3065328).

Almost surely, 2^51814380 is an apocalyptic number.

It is an amenable number.

51814380 is an abundant number, since it is smaller than the sum of its proper divisors (95321364).

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

51814380 is a wasteful number, since it uses less digits than its factorization.

51814380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12246 (or 12244 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 51814380 is about 7198.2206134572. The cubic root of 51814380 is about 372.8064652093.

The spelling of 51814380 in words is "fifty-one million, eight hundred fourteen thousand, three hundred eighty".