51504402 has 16 divisors (see below), whose sum is σ = 108430560. Its totient is φ = 16264512.

The previous prime is 51504391. The next prime is 51504437. The reversal of 51504402 is 20440515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225783 + ... + 226010.

It is an arithmetic number, because the mean of its divisors is an integer number (6776910).

Almost surely, 2^51504402 is an apocalyptic number.

51504402 is an abundant number, since it is smaller than the sum of its proper divisors (56926158).

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

51504402 is a wasteful number, since it uses less digits than its factorization.

51504402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451817.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 51504402 is about 7176.6567425229. The cubic root of 51504402 is about 372.0615431766.

Adding to 51504402 its reverse (20440515), we get a palindrome (71944917).

The spelling of 51504402 in words is "fifty-one million, five hundred four thousand, four hundred two".