231621130986 has 64 divisors (see below), whose sum is σ = 535263510528. Its totient is φ = 65449536768.

The previous prime is 231621130889. The next prime is 231621130999. The reversal of 231621130986 is 689031126132.

It is a super-3 number, since 3×231621130986³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 2144695 + ... + 2250101.

It is an arithmetic number, because the mean of its divisors is an integer number (8363492352).

Almost surely, 2^231621130986 is an apocalyptic number.

231621130986 is an abundant number, since it is smaller than the sum of its proper divisors (303642379542).

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

231621130986 is a wasteful number, since it uses less digits than its factorization.

231621130986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105995.

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 231621130986 in words is "two hundred thirty-one billion, six hundred twenty-one million, one hundred thirty thousand, nine hundred eighty-six".