37552561 has 2 divisors, whose sum is σ = 37552562. Its totient is φ = 37552560.

The previous prime is 37552553. The next prime is 37552621. The reversal of 37552561 is 16525573.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31080625 + 6471936 = 5575^2 + 2544^2 .

It is a cyclic number.

It is not a de Polignac number, because 37552561 - 2³ = 37552553 is a prime.

It is not a weakly prime, because it can be changed into another prime (37552511) 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 as a sum of consecutive naturals, namely, 18776280 + 18776281.

It is an arithmetic number, because the mean of its divisors is an integer number (18776281).

Almost surely, 2^37552561 is an apocalyptic number.

It is an amenable number.

37552561 is a deficient number, since it is larger than the sum of its proper divisors (1).

37552561 is an equidigital number, since it uses as much as digits as its factorization.

37552561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31500, while the sum is 34.

The square root of 37552561 is about 6128.0144418890. The cubic root of 37552561 is about 334.8727845470.

The spelling of 37552561 in words is "thirty-seven million, five hundred fifty-two thousand, five hundred sixty-one".