23311315240 has 16 divisors (see below), whose sum is σ = 52450459380. Its totient is φ = 9324526080.

The previous prime is 23311315231. The next prime is 23311315243. The reversal of 23311315240 is 4251311332.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21686096644 + 1625218596 = 147262^2 + 40314^2 .

It is not an unprimeable number, because it can be changed into a prime (23311315243) 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, 291391401 + ... + 291391480.

Almost surely, 2^23311315240 is an apocalyptic number.

23311315240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23311315240 is an abundant number, since it is smaller than the sum of its proper divisors (29139144140).

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

23311315240 is a wasteful number, since it uses less digits than its factorization.

23311315240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582782892 (or 582782888 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 23311315240 its reverse (4251311332), we get a palindrome (27562626572).

The spelling of 23311315240 in words is "twenty-three billion, three hundred eleven million, three hundred fifteen thousand, two hundred forty".