15311442540 has 24 divisors (see below), whose sum is σ = 42872039280. Its totient is φ = 4083051328.

The previous prime is 15311442413. The next prime is 15311442551. The reversal of 15311442540 is 4524411351.

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 = 15311442498 and 15311442507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127595295 + ... + 127595414.

It is an arithmetic number, because the mean of its divisors is an integer number (1786334970).

Almost surely, 2^15311442540 is an apocalyptic number.

15311442540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15311442540 is an abundant number, since it is smaller than the sum of its proper divisors (27560596740).

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

15311442540 is a wasteful number, since it uses less digits than its factorization.

15311442540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255190721 (or 255190719 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 15311442540 its reverse (4524411351), we get a palindrome (19835853891).

The spelling of 15311442540 in words is "fifteen billion, three hundred eleven million, four hundred forty-two thousand, five hundred forty".