30531142 has 32 divisors (see below), whose sum is σ = 49986720. Its totient is φ = 13950720.

The previous prime is 30531139. The next prime is 30531173. The reversal of 30531142 is 24113503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87813 + ... + 88159.

It is an arithmetic number, because the mean of its divisors is an integer number (1562085).

Almost surely, 2^30531142 is an apocalyptic number.

30531142 is a deficient number, since it is larger than the sum of its proper divisors (19455578).

30531142 is a wasteful number, since it uses less digits than its factorization.

30531142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 30531142 is about 5525.4992534612. The cubic root of 30531142 is about 312.5462911691.

Adding to 30531142 its reverse (24113503), we get a palindrome (54644645).

The spelling of 30531142 in words is "thirty million, five hundred thirty-one thousand, one hundred forty-two".