51404032 has 18 divisors (see below), whose sum is σ = 102607778. Its totient is φ = 25701888.

The previous prime is 51403991. The next prime is 51404053. The reversal of 51404032 is 23040415.

It can be written as a sum of positive squares in only one way, i.e., 46457856 + 4946176 = 6816^2 + 2224^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100143 + ... + 100654.

Almost surely, 2^51404032 is an apocalyptic number.

It is an amenable number.

51404032 is a deficient number, since it is larger than the sum of its proper divisors (51203746).

51404032 is an equidigital number, since it uses as much as digits as its factorization.

51404032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200813 (or 200799 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 51404032 is about 7169.6605219494. The cubic root of 51404032 is about 371.8196991138.

Adding to 51404032 its reverse (23040415), we get a palindrome (74444447).

The spelling of 51404032 in words is "fifty-one million, four hundred four thousand, thirty-two".