16313561 has 8 divisors (see below), whose sum is σ = 17934048. Its totient is φ = 14716000.

The previous prime is 16313551. The next prime is 16313569. The reversal of 16313561 is 16531361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16313561 - 2⁶ = 16313497 is a prime.

It is a super-2 number, since 2×16313561² = 532264545001442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16313561.

It is not an unprimeable number, because it can be changed into a prime (16313569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4220 + ... + 7101.

It is an arithmetic number, because the mean of its divisors is an integer number (2241756).

Almost surely, 2^16313561 is an apocalyptic number.

16313561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16313561 is a deficient number, since it is larger than the sum of its proper divisors (1620487).

16313561 is a wasteful number, since it uses less digits than its factorization.

16313561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11463.

The product of its digits is 1620, while the sum is 26.

The square root of 16313561 is about 4039.0049517177. The cubic root of 16313561 is about 253.6196645165.

The spelling of 16313561 in words is "sixteen million, three hundred thirteen thousand, five hundred sixty-one".