30631142 has 4 divisors (see below), whose sum is σ = 45946716. Its totient is φ = 15315570.

The previous prime is 30631129. The next prime is 30631151. The reversal of 30631142 is 24113603.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7657784 + ... + 7657787.

It is an arithmetic number, because the mean of its divisors is an integer number (11486679).

Almost surely, 2^30631142 is an apocalyptic number.

30631142 is a deficient number, since it is larger than the sum of its proper divisors (15315574).

30631142 is a wasteful number, since it uses less digits than its factorization.

30631142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15315573.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30631142 is about 5534.5408120277. The cubic root of 30631142 is about 312.8871515258.

Adding to 30631142 its reverse (24113603), we get a palindrome (54744745).

The spelling of 30631142 in words is "thirty million, six hundred thirty-one thousand, one hundred forty-two".