37022221 has 4 divisors (see below), whose sum is σ = 37925244. Its totient is φ = 36119200.

The previous prime is 37022213. The next prime is 37022231. The reversal of 37022221 is 12222073.

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 15760900 + 21261321 = 3970^2 + 4611^2 .

It is a cyclic number.

It is not a de Polignac number, because 37022221 - 2³ = 37022213 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 (37022231) 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, 451450 + ... + 451531.

It is an arithmetic number, because the mean of its divisors is an integer number (9481311).

Almost surely, 2^37022221 is an apocalyptic number.

It is an amenable number.

37022221 is a deficient number, since it is larger than the sum of its proper divisors (903023).

37022221 is an equidigital number, since it uses as much as digits as its factorization.

37022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903022.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 37022221 is about 6084.5888110866. The cubic root of 37022221 is about 333.2888792940.

Adding to 37022221 its reverse (12222073), we get a palindrome (49244294).

The spelling of 37022221 in words is "thirty-seven million, twenty-two thousand, two hundred twenty-one".