31442401242 has 36 divisors (see below), whose sum is σ = 79247686986. Its totient is φ = 8983542960.

The previous prime is 31442401231. The next prime is 31442401247. The reversal of 31442401242 is 24210424413.

31442401242 is a `hidden beast` number, since 3 + 14 + 4 + 2 + 401 + 242 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29227663521 + 2214737721 = 170961^2 + 47061^2 .

It is not an unprimeable number, because it can be changed into a prime (31442401247) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17823609 + ... + 17825372.

Almost surely, 2^31442401242 is an apocalyptic number.

31442401242 is an abundant number, since it is smaller than the sum of its proper divisors (47805285744).

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

31442401242 is a wasteful number, since it uses less digits than its factorization.

31442401242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35649003 (or 35648993 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 31442401242 its reverse (24210424413), we get a palindrome (55652825655).

The spelling of 31442401242 in words is "thirty-one billion, four hundred forty-two million, four hundred one thousand, two hundred forty-two".