37220681 has 8 divisors (see below), whose sum is σ = 38568960. Its totient is φ = 35896432.

The previous prime is 37220653. The next prime is 37220737. The reversal of 37220681 is 18602273.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 37220681 - 2¹⁰ = 37219657 is a prime.

It is a super-2 number, since 2×37220681² = 2770758188207522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37220641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2825 + ... + 9078.

It is an arithmetic number, because the mean of its divisors is an integer number (4821120).

Almost surely, 2^37220681 is an apocalyptic number.

It is an amenable number.

37220681 is a deficient number, since it is larger than the sum of its proper divisors (1348279).

37220681 is a wasteful number, since it uses less digits than its factorization.

37220681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12015.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 37220681 is about 6100.8754289856. The cubic root of 37220681 is about 333.8833571445.

The spelling of 37220681 in words is "thirty-seven million, two hundred twenty thousand, six hundred eighty-one".