15521875222540 has 48 divisors (see below), whose sum is σ = 33733917584640. Its totient is φ = 5993021802240.

The previous prime is 15521875222501. The next prime is 15521875222549. The reversal of 15521875222540 is 4522257812551.

It is a super-2 number, since 2×15521875222540² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15521875222549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31937847 + ... + 32420206.

It is an arithmetic number, because the mean of its divisors is an integer number (702789949680).

Almost surely, 2^{15521875222540} is an apocalyptic number.

15521875222540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15521875222540 is an abundant number, since it is smaller than the sum of its proper divisors (18212042362100).

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

15521875222540 is a wasteful number, since it uses less digits than its factorization.

15521875222540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64358482 (or 64358480 counting only the distinct ones).

The product of its (nonzero) digits is 2240000, while the sum is 49.

The spelling of 15521875222540 in words is "fifteen trillion, five hundred twenty-one billion, eight hundred seventy-five million, two hundred twenty-two thousand, five hundred forty".