15552666231 has 4 divisors (see below), whose sum is σ = 20736888312. Its totient is φ = 10368444152.

The previous prime is 15552666229. The next prime is 15552666281. The reversal of 15552666231 is 13266625551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15552666231 - 2¹ = 15552666229 is a prime.

It is a super-2 number, since 2×15552666231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15552666211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2592111036 + ... + 2592111041.

It is an arithmetic number, because the mean of its divisors is an integer number (5184222078).

Almost surely, 2^15552666231 is an apocalyptic number.

15552666231 is a deficient number, since it is larger than the sum of its proper divisors (5184222081).

15552666231 is an equidigital number, since it uses as much as digits as its factorization.

15552666231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5184222080.

The product of its digits is 324000, while the sum is 42.

The spelling of 15552666231 in words is "fifteen billion, five hundred fifty-two million, six hundred sixty-six thousand, two hundred thirty-one".