30992151 has 4 divisors (see below), whose sum is σ = 41322872. Its totient is φ = 20661432.

The previous prime is 30992147. The next prime is 30992161. The reversal of 30992151 is 15129903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15129903 = 3 ⋅5043301.

It is not a de Polignac number, because 30992151 - 2² = 30992147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30992161) 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, 5165356 + ... + 5165361.

It is an arithmetic number, because the mean of its divisors is an integer number (10330718).

Almost surely, 2^30992151 is an apocalyptic number.

30992151 is a deficient number, since it is larger than the sum of its proper divisors (10330721).

30992151 is a wasteful number, since it uses less digits than its factorization.

30992151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10330720.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 30992151 is about 5567.0594572000. The cubic root of 30992151 is about 314.1115504241. Note that the first 3 decimals are identical.

The spelling of 30992151 in words is "thirty million, nine hundred ninety-two thousand, one hundred fifty-one".