201631254542 has 16 divisors (see below), whose sum is σ = 312992290512. Its totient is φ = 97342090560.

The previous prime is 201631254533. The next prime is 201631254563. The reversal of 201631254542 is 245452136102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10390103 + ... + 10409490.

It is an arithmetic number, because the mean of its divisors is an integer number (19562018157).

Almost surely, 2^201631254542 is an apocalyptic number.

201631254542 is a deficient number, since it is larger than the sum of its proper divisors (111361035970).

201631254542 is a wasteful number, since it uses less digits than its factorization.

201631254542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20799763.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 201631254542 in words is "two hundred one billion, six hundred thirty-one million, two hundred fifty-four thousand, five hundred forty-two".