100515431431 has 4 divisors (see below), whose sum is σ = 100516139392. Its totient is φ = 100514723472.

The previous prime is 100515431399. The next prime is 100515431477. The reversal of 100515431431 is 134134515001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 134134515001 = 24917 ⋅5383253.

It is a cyclic number.

It is not a de Polignac number, because 100515431431 - 2⁵ = 100515431399 is a prime.

It is a super-2 number, since 2×100515431431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100515431431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100515431831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59166 + ... + 452251.

It is an arithmetic number, because the mean of its divisors is an integer number (25129034848).

Almost surely, 2^100515431431 is an apocalyptic number.

100515431431 is a deficient number, since it is larger than the sum of its proper divisors (707961).

100515431431 is an equidigital number, since it uses as much as digits as its factorization.

100515431431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707960.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 100515431431 its reverse (134134515001), we get a palindrome (234649946432).

The spelling of 100515431431 in words is "one hundred billion, five hundred fifteen million, four hundred thirty-one thousand, four hundred thirty-one".