30812542 has 16 divisors (see below), whose sum is σ = 47515392. Its totient is φ = 14978520.

The previous prime is 30812531. The next prime is 30812549. The reversal of 30812542 is 24521803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30812549) 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, 14317 + ... + 16327.

It is an arithmetic number, because the mean of its divisors is an integer number (2969712).

Almost surely, 2^30812542 is an apocalyptic number.

30812542 is a deficient number, since it is larger than the sum of its proper divisors (16702850).

30812542 is a wasteful number, since it uses less digits than its factorization.

30812542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 30812542 is about 5550.9046109621. The cubic root of 30812542 is about 313.5035836004.

The spelling of 30812542 in words is "thirty million, eight hundred twelve thousand, five hundred forty-two".