51101044402 has 4 divisors (see below), whose sum is σ = 76651566606. Its totient is φ = 25550522200.

The previous prime is 51101044399. The next prime is 51101044429. The reversal of 51101044402 is 20444010115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 33737975041 + 17363069361 = 183679^2 + 131769^2 .

It is a super-2 number, since 2×51101044402² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775261099 + ... + 12775261102.

Almost surely, 2^51101044402 is an apocalyptic number.

51101044402 is a deficient number, since it is larger than the sum of its proper divisors (25550522204).

51101044402 is a wasteful number, since it uses less digits than its factorization.

51101044402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25550522203.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 51101044402 its reverse (20444010115), we get a palindrome (71545054517).

The spelling of 51101044402 in words is "fifty-one billion, one hundred one million, forty-four thousand, four hundred two".