15481564 has 12 divisors (see below), whose sum is σ = 30963184. Its totient is φ = 6634944.

The previous prime is 15481549. The next prime is 15481567. The reversal of 15481564 is 46518451.

15481564 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15481567) 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, 276429 + ... + 276484.

Almost surely, 2^15481564 is an apocalyptic number.

15481564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

15481564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15481564 is a wasteful number, since it uses less digits than its factorization.

15481564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552924 (or 552922 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 15481564 is about 3934.6618660312. The cubic root of 15481564 is about 249.2326551372.

It can be divided in two parts, 154 and 81564, that added together give a palindrome (81718).

The spelling of 15481564 in words is "fifteen million, four hundred eighty-one thousand, five hundred sixty-four".