372228121 has 4 divisors (see below), whose sum is σ = 372589492. Its totient is φ = 371866752.

The previous prime is 372228119. The next prime is 372228149. The reversal of 372228121 is 121822273.

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

It can be written as a sum of positive squares in 2 ways, for example, as 321305625 + 50922496 = 17925^2 + 7136^2 .

It is a cyclic number.

It is not a de Polignac number, because 372228121 - 2¹ = 372228119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 372228121.

It is not an unprimeable number, because it can be changed into a prime (372238121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179136 + ... + 181201.

It is an arithmetic number, because the mean of its divisors is an integer number (93147373).

Almost surely, 2^372228121 is an apocalyptic number.

It is an amenable number.

372228121 is a deficient number, since it is larger than the sum of its proper divisors (361371).

372228121 is a wasteful number, since it uses less digits than its factorization.

372228121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361370.

The product of its digits is 2688, while the sum is 28.

The square root of 372228121 is about 19293.2143770809. The cubic root of 372228121 is about 719.3436153979.

The spelling of 372228121 in words is "three hundred seventy-two million, two hundred twenty-eight thousand, one hundred twenty-one".