2313256440 has 64 divisors (see below), whose sum is σ = 7570661760. Its totient is φ = 560789120.

The previous prime is 2313256399. The next prime is 2313256459. The reversal of 2313256440 is 446523132.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2313256398 and 2313256407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 874914 + ... + 877553.

It is an arithmetic number, because the mean of its divisors is an integer number (118291590).

Almost surely, 2^2313256440 is an apocalyptic number.

2313256440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2313256440 is an abundant number, since it is smaller than the sum of its proper divisors (5257405320).

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

2313256440 is a wasteful number, since it uses less digits than its factorization.

2313256440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752492 (or 1752488 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 2313256440 is about 48096.3245997030. The cubic root of 2313256440 is about 1322.5372914348.

Adding to 2313256440 its reverse (446523132), we get a palindrome (2759779572).

The spelling of 2313256440 in words is "two billion, three hundred thirteen million, two hundred fifty-six thousand, four hundred forty".