15316213540 has 24 divisors (see below), whose sum is σ = 32166425592. Its totient is φ = 6126032640.

The previous prime is 15316213537. The next prime is 15316213547. The reversal of 15316213540 is 4531261351.

It can be written as a sum of positive squares in 4 ways, for example, as 5809183524 + 9507030016 = 76218^2 + 97504^2 .

It is not an unprimeable number, because it can be changed into a prime (15316213547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430512 + ... + 464728.

It is an arithmetic number, because the mean of its divisors is an integer number (1340267733).

Almost surely, 2^15316213540 is an apocalyptic number.

15316213540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15316213540 is an abundant number, since it is smaller than the sum of its proper divisors (16850212052).

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

15316213540 is a wasteful number, since it uses less digits than its factorization.

15316213540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56607 (or 56605 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 15316213540 its reverse (4531261351), we get a palindrome (19847474891).

The spelling of 15316213540 in words is "fifteen billion, three hundred sixteen million, two hundred thirteen thousand, five hundred forty".