30047131 has 12 divisors (see below), whose sum is σ = 32149872. Its totient is φ = 28018848.

The previous prime is 30047123. The next prime is 30047167. The reversal of 30047131 is 13174003.

It is not a de Polignac number, because 30047131 - 2³ = 30047123 is a prime.

It is a super-2 number, since 2×30047131² = 1805660162662322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30047099 and 30047108.

It is not an unprimeable number, because it can be changed into a prime (30047111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191305 + ... + 191461.

It is an arithmetic number, because the mean of its divisors is an integer number (2679156).

Almost surely, 2^30047131 is an apocalyptic number.

30047131 is a deficient number, since it is larger than the sum of its proper divisors (2102741).

30047131 is an equidigital number, since it uses as much as digits as its factorization.

30047131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 30047131 is about 5481.5263385302. The cubic root of 30047131 is about 310.8858843188.

The spelling of 30047131 in words is "thirty million, forty-seven thousand, one hundred thirty-one".