61222539 has 16 divisors (see below), whose sum is σ = 93415680. Its totient is φ = 34937760.

The previous prime is 61222537. The next prime is 61222547. The reversal of 61222539 is 93522216.

It is not a de Polignac number, because 61222539 - 2¹ = 61222537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61222537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19969 + ... + 22829.

It is an arithmetic number, because the mean of its divisors is an integer number (5838480).

Almost surely, 2^61222539 is an apocalyptic number.

61222539 is a deficient number, since it is larger than the sum of its proper divisors (32193141).

61222539 is a wasteful number, since it uses less digits than its factorization.

61222539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3890.

The product of its digits is 6480, while the sum is 30.

The square root of 61222539 is about 7824.4833056247. The cubic root of 61222539 is about 394.1278390766.

The spelling of 61222539 in words is "sixty-one million, two hundred twenty-two thousand, five hundred thirty-nine".