15401021161 has 4 divisors (see below), whose sum is σ = 15617937024. Its totient is φ = 15184105300.

The previous prime is 15401021137. The next prime is 15401021221. The reversal of 15401021161 is 16112010451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15401021161 - 2²⁵ = 15367466729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15401021261) 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, 108457825 + ... + 108457966.

It is an arithmetic number, because the mean of its divisors is an integer number (3904484256).

Almost surely, 2^15401021161 is an apocalyptic number.

It is an amenable number.

15401021161 is a deficient number, since it is larger than the sum of its proper divisors (216915863).

15401021161 is an equidigital number, since it uses as much as digits as its factorization.

15401021161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216915862.

The product of its (nonzero) digits is 240, while the sum is 22.

The spelling of 15401021161 in words is "fifteen billion, four hundred one million, twenty-one thousand, one hundred sixty-one".