1231531052554 has 64 divisors (see below), whose sum is σ = 2087598292992. Its totient is φ = 539953646400.

The previous prime is 1231531052539. The next prime is 1231531052567. The reversal of 1231531052554 is 4552501351321.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162403047 + ... + 162410629.

It is an arithmetic number, because the mean of its divisors is an integer number (32618723328).

Almost surely, 2^{1231531052554} is an apocalyptic number.

1231531052554 is a deficient number, since it is larger than the sum of its proper divisors (856067240438).

1231531052554 is a wasteful number, since it uses less digits than its factorization.

1231531052554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9331.

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 1231531052554 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-one million, fifty-two thousand, five hundred fifty-four".