306531042 has 16 divisors (see below), whose sum is σ = 613241280. Its totient is φ = 102147152.

The previous prime is 306531037. The next prime is 306531059. The reversal of 306531042 is 240135603.

It is a happy number.

It is a super-2 number, since 2×306531042² = 187922559419211528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27043 + ... + 36665.

It is an arithmetic number, because the mean of its divisors is an integer number (38327580).

Almost surely, 2^306531042 is an apocalyptic number.

306531042 is an abundant number, since it is smaller than the sum of its proper divisors (306710238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

306531042 is a wasteful number, since it uses less digits than its factorization.

306531042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14937.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 306531042 is about 17508.0279300668. The cubic root of 306531042 is about 674.2560011009.

Adding to 306531042 its reverse (240135603), we get a palindrome (546666645).

The spelling of 306531042 in words is "three hundred six million, five hundred thirty-one thousand, forty-two".