221353252631 has 12 divisors (see below), whose sum is σ = 262971127008. Its totient is φ = 185694520032.

The previous prime is 221353252621. The next prime is 221353252633. The reversal of 221353252631 is 136252353122.

It is not a de Polignac number, because 221353252631 - 2¹⁰ = 221353251607 is a prime.

It is a super-2 number, since 2×221353252631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221353252591 and 221353252600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221353252633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48055286 + ... + 48059891.

It is an arithmetic number, because the mean of its divisors is an integer number (21914260584).

Almost surely, 2^221353252631 is an apocalyptic number.

221353252631 is a deficient number, since it is larger than the sum of its proper divisors (41617874377).

221353252631 is an equidigital number, since it uses as much as digits as its factorization.

221353252631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96115238 (or 96115231 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The spelling of 221353252631 in words is "two hundred twenty-one billion, three hundred fifty-three million, two hundred fifty-two thousand, six hundred thirty-one".