221625311873407 has 4 divisors (see below), whose sum is σ = 238673412786760. Its totient is φ = 204577210960056.

The previous prime is 221625311873351. The next prime is 221625311873429. The reversal of 221625311873407 is 704378113526122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221625311873407 - 2⁷ = 221625311873279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221625311873467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8524050456657 + ... + 8524050456682.

It is an arithmetic number, because the mean of its divisors is an integer number (59668353196690).

Almost surely, 2^{221625311873407} is an apocalyptic number.

221625311873407 is a deficient number, since it is larger than the sum of its proper divisors (17048100913353).

221625311873407 is a wasteful number, since it uses less digits than its factorization.

221625311873407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17048100913352.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 221625311873407 in words is "two hundred twenty-one trillion, six hundred twenty-five billion, three hundred eleven million, eight hundred seventy-three thousand, four hundred seven".