37522021 has 2 divisors, whose sum is σ = 37522022. Its totient is φ = 37522020.

The previous prime is 37522019. The next prime is 37522063. The reversal of 37522021 is 12022573.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27185796 + 10336225 = 5214^2 + 3215^2 .

It is a cyclic number.

It is not a de Polignac number, because 37522021 - 2¹ = 37522019 is a prime.

Together with 37522019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 37521983 and 37522001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37522081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18761010 + 18761011.

It is an arithmetic number, because the mean of its divisors is an integer number (18761011).

Almost surely, 2^37522021 is an apocalyptic number.

It is an amenable number.

37522021 is a deficient number, since it is larger than the sum of its proper divisors (1).

37522021 is an equidigital number, since it uses as much as digits as its factorization.

37522021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 37522021 is about 6125.5221001968. The cubic root of 37522021 is about 334.7819803672.

Adding to 37522021 its reverse (12022573), we get a palindrome (49544594).

The spelling of 37522021 in words is "thirty-seven million, five hundred twenty-two thousand, twenty-one".