113551443631 has 4 divisors (see below), whose sum is σ = 113665337752. Its totient is φ = 113437549512.

The previous prime is 113551443623. The next prime is 113551443637. The reversal of 113551443631 is 136344155311.

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

It is a cyclic number.

It is not a de Polignac number, because 113551443631 - 2³ = 113551443623 is a prime.

It is a super-2 number, since 2×113551443631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113551443637) 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, 56945565 + ... + 56947558.

It is an arithmetic number, because the mean of its divisors is an integer number (28416334438).

Almost surely, 2^113551443631 is an apocalyptic number.

113551443631 is a deficient number, since it is larger than the sum of its proper divisors (113894121).

113551443631 is an equidigital number, since it uses as much as digits as its factorization.

113551443631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113894120.

The product of its digits is 64800, while the sum is 37.

Adding to 113551443631 its reverse (136344155311), we get a palindrome (249895598942).

The spelling of 113551443631 in words is "one hundred thirteen billion, five hundred fifty-one million, four hundred forty-three thousand, six hundred thirty-one".