220921671597 has 32 divisors (see below), whose sum is σ = 326125491840. Its totient is φ = 131909099520.

The previous prime is 220921671577. The next prime is 220921671613. The reversal of 220921671597 is 795176129022.

It is not a de Polignac number, because 220921671597 - 2¹⁸ = 220921409453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220921671557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 677773 + ... + 949325.

It is an arithmetic number, because the mean of its divisors is an integer number (10191421620).

Almost surely, 2^220921671597 is an apocalyptic number.

It is an amenable number.

220921671597 is a deficient number, since it is larger than the sum of its proper divisors (105203820243).

220921671597 is a wasteful number, since it uses less digits than its factorization.

220921671597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271933.

The product of its (nonzero) digits is 952560, while the sum is 51.

The spelling of 220921671597 in words is "two hundred twenty billion, nine hundred twenty-one million, six hundred seventy-one thousand, five hundred ninety-seven".