100434431431 has 2 divisors, whose sum is σ = 100434431432. Its totient is φ = 100434431430.

The previous prime is 100434431389. The next prime is 100434431491. The reversal of 100434431431 is 134134434001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100434431431 - 2²¹ = 100432334279 is a prime.

It is a super-2 number, since 2×100434431431² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 100434431431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100434431491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50217215715 + 50217215716.

It is an arithmetic number, because the mean of its divisors is an integer number (50217215716).

Almost surely, 2^100434431431 is an apocalyptic number.

100434431431 is a deficient number, since it is larger than the sum of its proper divisors (1).

100434431431 is an equidigital number, since it uses as much as digits as its factorization.

100434431431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 100434431431 its reverse (134134434001), we get a palindrome (234568865432).

The spelling of 100434431431 in words is "one hundred billion, four hundred thirty-four million, four hundred thirty-one thousand, four hundred thirty-one".