39220261 has 4 divisors (see below), whose sum is σ = 39716800. Its totient is φ = 38723724.

The previous prime is 39220243. The next prime is 39220273. The reversal of 39220261 is 16202293.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39220261 - 2⁵ = 39220229 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 (39220201) 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, 248151 + ... + 248308.

It is an arithmetic number, because the mean of its divisors is an integer number (9929200).

Almost surely, 2^39220261 is an apocalyptic number.

It is an amenable number.

39220261 is a deficient number, since it is larger than the sum of its proper divisors (496539).

39220261 is an equidigital number, since it uses as much as digits as its factorization.

39220261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496538.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 39220261 is about 6262.6081627386. The cubic root of 39220261 is about 339.7583663771.

The spelling of 39220261 in words is "thirty-nine million, two hundred twenty thousand, two hundred sixty-one".