15441561 has 6 divisors (see below), whose sum is σ = 22304490. Its totient is φ = 10294368.

The previous prime is 15441541. The next prime is 15441571. The reversal of 15441561 is 16514451.

It can be written as a sum of positive squares in only one way, i.e., 14107536 + 1334025 = 3756^2 + 1155^2 .

It is not a de Polignac number, because 15441561 - 2⁵ = 15441529 is a prime.

It is a super-2 number, since 2×15441561² = 476883612233442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15441511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 857856 + ... + 857873.

It is an arithmetic number, because the mean of its divisors is an integer number (3717415).

Almost surely, 2^15441561 is an apocalyptic number.

It is an amenable number.

15441561 is a deficient number, since it is larger than the sum of its proper divisors (6862929).

15441561 is a wasteful number, since it uses less digits than its factorization.

15441561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715735 (or 1715732 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 15441561 is about 3929.5751678776. The cubic root of 15441561 is about 249.0178048912.

The spelling of 15441561 in words is "fifteen million, four hundred forty-one thousand, five hundred sixty-one".