16172051 has 4 divisors (see below), whose sum is σ = 18482352. Its totient is φ = 13861752.

The previous prime is 16172047. The next prime is 16172069. The reversal of 16172051 is 15027161.

16172051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15027161 = 167 ⋅89983.

It is a cyclic number.

It is not a de Polignac number, because 16172051 - 2² = 16172047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16172041) 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, 1155140 + ... + 1155153.

It is an arithmetic number, because the mean of its divisors is an integer number (4620588).

Almost surely, 2^16172051 is an apocalyptic number.

16172051 is a deficient number, since it is larger than the sum of its proper divisors (2310301).

16172051 is an equidigital number, since it uses as much as digits as its factorization.

16172051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310300.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 16172051 is about 4021.4488682563. The cubic root of 16172051 is about 252.8842028680.

The spelling of 16172051 in words is "sixteen million, one hundred seventy-two thousand, fifty-one".