51100312542 has 32 divisors (see below), whose sum is σ = 102384172800. Its totient is φ = 17002877760.

The previous prime is 51100312541. The next prime is 51100312559. The reversal of 51100312542 is 24521300115.

It is a happy number.

It is a super-2 number, since 2×51100312542² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51100312541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9633463 + ... + 9638765.

It is an arithmetic number, because the mean of its divisors is an integer number (3199505400).

Almost surely, 2^51100312542 is an apocalyptic number.

51100312542 is an abundant number, since it is smaller than the sum of its proper divisors (51283860258).

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

51100312542 is a wasteful number, since it uses less digits than its factorization.

51100312542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7888.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 51100312542 its reverse (24521300115), we get a palindrome (75621612657).

The spelling of 51100312542 in words is "fifty-one billion, one hundred million, three hundred twelve thousand, five hundred forty-two".