37822221 has 24 divisors (see below), whose sum is σ = 56949984. Its totient is φ = 25084080.

The previous prime is 37822199. The next prime is 37822243. The reversal of 37822221 is 12222873.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (37822199) and next prime (37822243).

It is not a de Polignac number, because 37822221 - 2⁶ = 37822157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37822261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76786 + ... + 77276.

It is an arithmetic number, because the mean of its divisors is an integer number (2372916).

Almost surely, 2^37822221 is an apocalyptic number.

It is an amenable number.

37822221 is a deficient number, since it is larger than the sum of its proper divisors (19127763).

37822221 is an equidigital number, since it uses as much as digits as its factorization.

37822221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 811 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 37822221 is about 6149.9773170313. The cubic root of 37822221 is about 335.6724326707.

The spelling of 37822221 in words is "thirty-seven million, eight hundred twenty-two thousand, two hundred twenty-one".