15135855 has 24 divisors (see below), whose sum is σ = 28172592. Its totient is φ = 6918912.

The previous prime is 15135853. The next prime is 15135877. The reversal of 15135855 is 55853151.

It is not a de Polignac number, because 15135855 - 2¹ = 15135853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15135853) 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, 9562 + ... + 11031.

It is an arithmetic number, because the mean of its divisors is an integer number (1173858).

Almost surely, 2^15135855 is an apocalyptic number.

15135855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15135855 is a deficient number, since it is larger than the sum of its proper divisors (13036737).

15135855 is a wasteful number, since it uses less digits than its factorization.

15135855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20615 (or 20608 counting only the distinct ones).

The product of its digits is 15000, while the sum is 33.

The square root of 15135855 is about 3890.4826178766. The cubic root of 15135855 is about 247.3635203059.

The spelling of 15135855 in words is "fifteen million, one hundred thirty-five thousand, eight hundred fifty-five".