15521406500252 has 12 divisors (see below), whose sum is σ = 27192408968760. Its totient is φ = 7752146794896.

The previous prime is 15521406500233. The next prime is 15521406500273. The reversal of 15521406500252 is 25200560412551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2139109727 + ... + 2139116982.

It is an arithmetic number, because the mean of its divisors is an integer number (2266034080730).

Almost surely, 2^{15521406500252} is an apocalyptic number.

It is an amenable number.

15521406500252 is a deficient number, since it is larger than the sum of its proper divisors (11671002468508).

15521406500252 is a wasteful number, since it uses less digits than its factorization.

15521406500252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278227620 (or 4278227618 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 38.

The spelling of 15521406500252 in words is "fifteen trillion, five hundred twenty-one billion, four hundred six million, five hundred thousand, two hundred fifty-two".