39522013 has 4 divisors (see below), whose sum is σ = 39534588. Its totient is φ = 39509440.

The previous prime is 39522001. The next prime is 39522017. The reversal of 39522013 is 31022593.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31022593 = 7 ⋅4431799.

It can be written as a sum of positive squares in 2 ways, for example, as 8139609 + 31382404 = 2853^2 + 5602^2 .

It is a cyclic number.

It is not a de Polignac number, because 39522013 - 2¹³ = 39513821 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 (39522017) 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, 3045 + ... + 9397.

It is an arithmetic number, because the mean of its divisors is an integer number (9883647).

Almost surely, 2^39522013 is an apocalyptic number.

It is an amenable number.

39522013 is a deficient number, since it is larger than the sum of its proper divisors (12575).

39522013 is an equidigital number, since it uses as much as digits as its factorization.

39522013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12574.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 39522013 is about 6286.6535613154. The cubic root of 39522013 is about 340.6274831118.

The spelling of 39522013 in words is "thirty-nine million, five hundred twenty-two thousand, thirteen".