15212051055 has 24 divisors (see below), whose sum is σ = 27080194752. Its totient is φ = 7893820224.

The previous prime is 15212051051. The next prime is 15212051077. The reversal of 15212051055 is 55015021251.

It is not a de Polignac number, because 15212051055 - 2² = 15212051051 is a prime.

It is a super-2 number, since 2×15212051055² (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 (15212051051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4566519 + ... + 4569848.

It is an arithmetic number, because the mean of its divisors is an integer number (1128341448).

Almost surely, 2^15212051055 is an apocalyptic number.

15212051055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15212051055 is a deficient number, since it is larger than the sum of its proper divisors (11868143697).

15212051055 is a wasteful number, since it uses less digits than its factorization.

15212051055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9136415 (or 9136412 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The spelling of 15212051055 in words is "fifteen billion, two hundred twelve million, fifty-one thousand, fifty-five".