231551356361472 has 450 divisors, whose sum is σ = 805470534336468. Its totient is φ = 66157516164096.

The previous prime is 231551356361461. The next prime is 231551356361497. The reversal of 231551356361472 is 274163653155132.

231551356361472 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 5 + 1 + 3 + 563 + 6 + 1 + 4 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 49 ways as a sum of consecutive naturals, for example, 47461723 + ... + 52112549.

Almost surely, 2^{231551356361472} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231551356361472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402735267168234).

231551356361472 is an abundant number, since it is smaller than the sum of its proper divisors (573919177974996).

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

231551356361472 is an frugal number, since it uses more digits than its factorization.

231551356361472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4650883 (or 4650839 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 54.

The spelling of 231551356361472 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, three hundred fifty-six million, three hundred sixty-one thousand, four hundred seventy-two".