51261004 has 6 divisors (see below), whose sum is σ = 89706764. Its totient is φ = 25630500.

The previous prime is 51260987. The next prime is 51261013. The reversal of 51261004 is 40016215.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6407622 + ... + 6407629.

Almost surely, 2^51261004 is an apocalyptic number.

It is an amenable number.

51261004 is a deficient number, since it is larger than the sum of its proper divisors (38445760).

51261004 is a wasteful number, since it uses less digits than its factorization.

51261004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12815255 (or 12815253 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 51261004 is about 7159.6790430857. The cubic root of 51261004 is about 371.4745249709.

Adding to 51261004 its reverse (40016215), we get a palindrome (91277219).

It can be divided in two parts, 512 and 61004, that added together give a palindrome (61516).

The spelling of 51261004 in words is "fifty-one million, two hundred sixty-one thousand, four".