30531641 has 4 divisors (see below), whose sum is σ = 34893312. Its totient is φ = 26169972.

The previous prime is 30531637. The next prime is 30531647. The reversal of 30531641 is 14613503.

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 30531641 - 2² = 30531637 is a prime.

It is a super-2 number, since 2×30531641² = 1864362204305762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30531647) 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, 2180825 + ... + 2180838.

It is an arithmetic number, because the mean of its divisors is an integer number (8723328).

Almost surely, 2^30531641 is an apocalyptic number.

It is an amenable number.

30531641 is a deficient number, since it is larger than the sum of its proper divisors (4361671).

30531641 is an equidigital number, since it uses as much as digits as its factorization.

30531641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4361670.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 30531641 is about 5525.5444075675. The cubic root of 30531641 is about 312.5479939087.

The spelling of 30531641 in words is "thirty million, five hundred thirty-one thousand, six hundred forty-one".