15161961 has 8 divisors (see below), whose sum is σ = 20345344. Its totient is φ = 10043280.

The previous prime is 15161959. The next prime is 15161969. The reversal of 15161961 is 16916151.

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

It is not a de Polignac number, because 15161961 - 2¹ = 15161959 is a prime.

It is a super-2 number, since 2×15161961² = 459770122731042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15161969) 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, 15625 + ... + 16566.

It is an arithmetic number, because the mean of its divisors is an integer number (2543168).

Almost surely, 2^15161961 is an apocalyptic number.

It is an amenable number.

15161961 is a deficient number, since it is larger than the sum of its proper divisors (5183383).

15161961 is a wasteful number, since it uses less digits than its factorization.

15161961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32351.

The product of its digits is 1620, while the sum is 30.

The square root of 15161961 is about 3893.8362831532. The cubic root of 15161961 is about 247.5056543959.

The spelling of 15161961 in words is "fifteen million, one hundred sixty-one thousand, nine hundred sixty-one".