373228421 has 4 divisors (see below), whose sum is σ = 395183052. Its totient is φ = 351273792.

The previous prime is 373228417. The next prime is 373228423. The reversal of 373228421 is 124822373.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124822373 = 13 ⋅9601721.

It can be written as a sum of positive squares in 2 ways, for example, as 343917025 + 29311396 = 18545^2 + 5414^2 .

It is a cyclic number.

It is not a de Polignac number, because 373228421 - 2² = 373228417 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 (373228423) 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, 10977290 + ... + 10977323.

It is an arithmetic number, because the mean of its divisors is an integer number (98795763).

Almost surely, 2^373228421 is an apocalyptic number.

It is an amenable number.

373228421 is a deficient number, since it is larger than the sum of its proper divisors (21954631).

373228421 is a wasteful number, since it uses less digits than its factorization.

373228421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21954630.

The product of its digits is 16128, while the sum is 32.

The square root of 373228421 is about 19319.1206062802. The cubic root of 373228421 is about 719.9874104023.

The spelling of 373228421 in words is "three hundred seventy-three million, two hundred twenty-eight thousand, four hundred twenty-one".