39221081 has 4 divisors (see below), whose sum is σ = 39267600. Its totient is φ = 39174564.

The previous prime is 39221053. The next prime is 39221087. The reversal of 39221081 is 18012293.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18012293 = 13 ⋅1385561.

It is a cyclic number.

It is not a de Polignac number, because 39221081 - 2¹⁸ = 38958937 is a prime.

It is a super-2 number, since 2×39221081² = 3076586389617122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 39221081.

It is not an unprimeable number, because it can be changed into a prime (39221087) 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, 21971 + ... + 23688.

It is an arithmetic number, because the mean of its divisors is an integer number (9816900).

Almost surely, 2^39221081 is an apocalyptic number.

It is an amenable number.

39221081 is a deficient number, since it is larger than the sum of its proper divisors (46519).

39221081 is an equidigital number, since it uses as much as digits as its factorization.

39221081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46518.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 39221081 is about 6262.6736303275. The cubic root of 39221081 is about 339.7607342002.

The spelling of 39221081 in words is "thirty-nine million, two hundred twenty-one thousand, eighty-one".