372822221 has 4 divisors (see below), whose sum is σ = 372980412. Its totient is φ = 372664032.

The previous prime is 372822217. The next prime is 372822227. The reversal of 372822221 is 122228273.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122228273 = 19 ⋅6433067.

It can be written as a sum of positive squares in 2 ways, for example, as 162282121 + 210540100 = 12739^2 + 14510^2 .

It is a cyclic number.

It is not a de Polignac number, because 372822221 - 2² = 372822217 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 (372822227) 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, 75506 + ... + 80291.

It is an arithmetic number, because the mean of its divisors is an integer number (93245103).

Almost surely, 2^372822221 is an apocalyptic number.

It is an amenable number.

372822221 is a deficient number, since it is larger than the sum of its proper divisors (158191).

372822221 is a wasteful number, since it uses less digits than its factorization.

372822221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158190.

The product of its digits is 5376, while the sum is 29.

The square root of 372822221 is about 19308.6048434370. The cubic root of 372822221 is about 719.7261181817.

The spelling of 372822221 in words is "three hundred seventy-two million, eight hundred twenty-two thousand, two hundred twenty-one".