51398232 has 16 divisors (see below), whose sum is σ = 128495640. Its totient is φ = 17132736.

The previous prime is 51398227. The next prime is 51398233. The reversal of 51398232 is 23289315.

It is a junction number, because it is equal to n+sod(n) for n = 51398193 and 51398202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51398233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070773 + ... + 1070820.

Almost surely, 2^51398232 is an apocalyptic number.

It is an amenable number.

51398232 is an abundant number, since it is smaller than the sum of its proper divisors (77097408).

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

51398232 is a wasteful number, since it uses less digits than its factorization.

51398232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141602 (or 2141598 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 51398232 is about 7169.2560283477. The cubic root of 51398232 is about 371.8057142486.

The spelling of 51398232 in words is "fifty-one million, three hundred ninety-eight thousand, two hundred thirty-two".