15220655452551 has 32 divisors (see below), whose sum is σ = 21734397020160. Its totient is φ = 9457399413504.

The previous prime is 15220655452537. The next prime is 15220655452589. The reversal of 15220655452551 is 15525455602251.

It is not a de Polignac number, because 15220655452551 - 2¹⁰ = 15220655451527 is a prime.

It is a super-2 number, since 2×15220655452551² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15220655452551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15220655453551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25196995 + ... + 25793988.

It is an arithmetic number, because the mean of its divisors is an integer number (679199906880).

Almost surely, 2^{15220655452551} is an apocalyptic number.

15220655452551 is a deficient number, since it is larger than the sum of its proper divisors (6513741567609).

15220655452551 is a wasteful number, since it uses less digits than its factorization.

15220655452551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50991135.

The product of its (nonzero) digits is 3000000, while the sum is 48.

The spelling of 15220655452551 in words is "fifteen trillion, two hundred twenty billion, six hundred fifty-five million, four hundred fifty-two thousand, five hundred fifty-one".