2312621540 has 24 divisors (see below), whose sum is σ = 4876666872. Its totient is φ = 921208320.

The previous prime is 2312621539. The next prime is 2312621551. The reversal of 2312621540 is 451262132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 405377956 + 1907243584 = 20134^2 + 43672^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235079 + ... + 244718.

It is an arithmetic number, because the mean of its divisors is an integer number (203194453).

Almost surely, 2^2312621540 is an apocalyptic number.

2312621540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2312621540 is an abundant number, since it is smaller than the sum of its proper divisors (2564045332).

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

2312621540 is a wasteful number, since it uses less digits than its factorization.

2312621540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480047 (or 480045 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 2312621540 is about 48089.7238503196. The cubic root of 2312621540 is about 1322.4162851420.

Adding to 2312621540 its reverse (451262132), we get a palindrome (2763883672).

The spelling of 2312621540 in words is "two billion, three hundred twelve million, six hundred twenty-one thousand, five hundred forty".