51345504 has 72 divisors (see below), whose sum is σ = 166879440. Its totient is φ = 14669568.

The previous prime is 51345487. The next prime is 51345521. The reversal of 51345504 is 40554315.

It is an interprime number because it is at equal distance from previous prime (51345487) and next prime (51345521).

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10719 + ... + 14750.

It is an arithmetic number, because the mean of its divisors is an integer number (2317770).

Almost surely, 2^51345504 is an apocalyptic number.

It is an amenable number.

51345504 is an abundant number, since it is smaller than the sum of its proper divisors (115533936).

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

51345504 is a wasteful number, since it uses less digits than its factorization.

51345504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25492 (or 25481 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 51345504 is about 7165.5777157184. The cubic root of 51345504 is about 371.6785290732.

Adding to 51345504 its reverse (40554315), we get a palindrome (91899819).

The spelling of 51345504 in words is "fifty-one million, three hundred forty-five thousand, five hundred four".