31220430200442 has 40 divisors (see below), whose sum is σ = 79950731309856. Its totient is φ = 8920122914088.

The previous prime is 31220430200429. The next prime is 31220430200459. The reversal of 31220430200442 is 24400203402213.

31220430200442 is a `hidden beast` number, since 3 + 1 + 2 + 20 + 430 + 200 + 4 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13765620648 + ... + 13765622915.

Almost surely, 2^{31220430200442} is an apocalyptic number.

31220430200442 is an abundant number, since it is smaller than the sum of its proper divisors (48730301109414).

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

31220430200442 is a wasteful number, since it uses less digits than its factorization.

31220430200442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27531243584 (or 27531243575 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 31220430200442 its reverse (24400203402213), we get a palindrome (55620633602655).

The spelling of 31220430200442 in words is "thirty-one trillion, two hundred twenty billion, four hundred thirty million, two hundred thousand, four hundred forty-two".