30431942 has 4 divisors (see below), whose sum is σ = 45647916. Its totient is φ = 15215970.

The previous prime is 30431941. The next prime is 30431957. The reversal of 30431942 is 24913403.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×30431942² = 1852206187782728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30431941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7607984 + ... + 7607987.

It is an arithmetic number, because the mean of its divisors is an integer number (11411979).

Almost surely, 2^30431942 is an apocalyptic number.

30431942 is a deficient number, since it is larger than the sum of its proper divisors (15215974).

30431942 is a wasteful number, since it uses less digits than its factorization.

30431942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15215973.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 30431942 is about 5516.5153856397. The cubic root of 30431942 is about 312.2074215186.

The spelling of 30431942 in words is "thirty million, four hundred thirty-one thousand, nine hundred forty-two".