31530366242 has 16 divisors (see below), whose sum is σ = 50640315480. Its totient is φ = 14671100928.

The previous prime is 31530366181. The next prime is 31530366253. The reversal of 31530366242 is 24266303513.

It can be written as a sum of positive squares in 4 ways, for example, as 30481318921 + 1049047321 = 174589^2 + 32389^2 .

It is a super-3 number, since 3×31530366242³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5206883 + ... + 5212934.

Almost surely, 2^31530366242 is an apocalyptic number.

31530366242 is a deficient number, since it is larger than the sum of its proper divisors (19109949238).

31530366242 is a wasteful number, since it uses less digits than its factorization.

31530366242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10419925.

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 31530366242 its reverse (24266303513), we get a palindrome (55796669755).

The spelling of 31530366242 in words is "thirty-one billion, five hundred thirty million, three hundred sixty-six thousand, two hundred forty-two".