113251780531 has 4 divisors (see below), whose sum is σ = 119913649992. Its totient is φ = 106589911072.

The previous prime is 113251780507. The next prime is 113251780541. The reversal of 113251780531 is 135087152311.

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 113251780531 - 2¹³ = 113251772339 is a prime.

It is a super-2 number, since 2×113251780531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113251780501) 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, 3330934705 + ... + 3330934738.

It is an arithmetic number, because the mean of its divisors is an integer number (29978412498).

Almost surely, 2^113251780531 is an apocalyptic number.

113251780531 is a deficient number, since it is larger than the sum of its proper divisors (6661869461).

113251780531 is an equidigital number, since it uses as much as digits as its factorization.

113251780531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6661869460.

The product of its (nonzero) digits is 25200, while the sum is 37.

It can be divided in two parts, 113251780 and 531, that added together give a palindrome (113252311).

The spelling of 113251780531 in words is "one hundred thirteen billion, two hundred fifty-one million, seven hundred eighty thousand, five hundred thirty-one".