51403032 has 32 divisors (see below), whose sum is σ = 142786800. Its totient is φ = 17134272.

The previous prime is 51403021. The next prime is 51403039. The reversal of 51403032 is 23030415.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 51402996 and 51403014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51403039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118773 + ... + 119204.

Almost surely, 2^51403032 is an apocalyptic number.

It is an amenable number.

51403032 is an abundant number, since it is smaller than the sum of its proper divisors (91383768).

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

51403032 is a wasteful number, since it uses less digits than its factorization.

51403032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237992 (or 237982 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 51403032 is about 7169.5907833014. The cubic root of 51403032 is about 371.8172880052.

Adding to 51403032 its reverse (23030415), we get a palindrome (74433447).

The spelling of 51403032 in words is "fifty-one million, four hundred three thousand, thirty-two".