15642255 has 16 divisors (see below), whose sum is σ = 25097184. Its totient is φ = 8319360.

The previous prime is 15642247. The next prime is 15642269. The reversal of 15642255 is 55224651.

It is not a de Polignac number, because 15642255 - 2³ = 15642247 is a prime.

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, 5077 + ... + 7553.

It is an arithmetic number, because the mean of its divisors is an integer number (1568574).

Almost surely, 2^15642255 is an apocalyptic number.

15642255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15642255 is a deficient number, since it is larger than the sum of its proper divisors (9454929).

15642255 is a wasteful number, since it uses less digits than its factorization.

15642255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906.

The product of its digits is 12000, while the sum is 30.

The square root of 15642255 is about 3955.0290770107. The cubic root of 15642255 is about 250.0919928118.

The spelling of 15642255 in words is "fifteen million, six hundred forty-two thousand, two hundred fifty-five".