15252157883621 has 8 divisors (see below), whose sum is σ = 15354853121400. Its totient is φ = 15149467069632.

The previous prime is 15252157883563. The next prime is 15252157883623. The reversal of 15252157883621 is 12638875125251.

It can be written as a sum of positive squares in 4 ways, for example, as 816041222500 + 14436116661121 = 903350^2 + 3799489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15252157883621 - 2²² = 15252153689317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15252157883623) 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, 5964431 + ... + 8128883.

It is an arithmetic number, because the mean of its divisors is an integer number (1919356640175).

Almost surely, 2^{15252157883621} is an apocalyptic number.

It is an amenable number.

15252157883621 is a deficient number, since it is larger than the sum of its proper divisors (102695237779).

15252157883621 is a wasteful number, since it uses less digits than its factorization.

15252157883621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211895.

The product of its digits is 8064000, while the sum is 56.

The spelling of 15252157883621 in words is "fifteen trillion, two hundred fifty-two billion, one hundred fifty-seven million, eight hundred eighty-three thousand, six hundred twenty-one".