15215001255 has 16 divisors (see below), whose sum is σ = 27048891360. Its totient is φ = 8114667264.

The previous prime is 15215001229. The next prime is 15215001301. The reversal of 15215001255 is 55210051251.

15215001255 is a `hidden beast` number, since 15 + 21 + 500 + 125 + 5 = 666.

It is not a de Polignac number, because 15215001255 - 2¹⁰ = 15215000231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56351722 + ... + 56351991.

It is an arithmetic number, because the mean of its divisors is an integer number (1690555710).

Almost surely, 2^15215001255 is an apocalyptic number.

15215001255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15215001255 is a deficient number, since it is larger than the sum of its proper divisors (11833890105).

15215001255 is a wasteful number, since it uses less digits than its factorization.

15215001255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112703727 (or 112703721 counting only the distinct ones).

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

The spelling of 15215001255 in words is "fifteen billion, two hundred fifteen million, one thousand, two hundred fifty-five".