30421957 has 8 divisors (see below), whose sum is σ = 31701600. Its totient is φ = 29157744.

The previous prime is 30421949. The next prime is 30421967. The reversal of 30421957 is 75912403.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30421957 - 2³ = 30421949 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 (30421967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258 + ... + 7804.

It is an arithmetic number, because the mean of its divisors is an integer number (3962700).

Almost surely, 2^30421957 is an apocalyptic number.

It is an amenable number.

30421957 is a deficient number, since it is larger than the sum of its proper divisors (1279643).

30421957 is a wasteful number, since it uses less digits than its factorization.

30421957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7715.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 30421957 is about 5515.6103016801. The cubic root of 30421957 is about 312.1732717414.

The spelling of 30421957 in words is "thirty million, four hundred twenty-one thousand, nine hundred fifty-seven".