61564233 has 16 divisors (see below), whose sum is σ = 85569536. Its totient is φ = 39327120.

The previous prime is 61564231. The next prime is 61564241. The reversal of 61564233 is 33246516.

It is not a de Polignac number, because 61564233 - 2¹ = 61564231 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61564233.

It is not an unprimeable number, because it can be changed into a prime (61564231) 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, 6366 + ... + 12792.

It is an arithmetic number, because the mean of its divisors is an integer number (5348096).

Almost surely, 2^61564233 is an apocalyptic number.

It is an amenable number.

61564233 is a deficient number, since it is larger than the sum of its proper divisors (24005303).

61564233 is a wasteful number, since it uses less digits than its factorization.

61564233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6564.

The product of its digits is 12960, while the sum is 30.

The square root of 61564233 is about 7846.2878484032. The cubic root of 61564233 is about 394.8597119716.

The spelling of 61564233 in words is "sixty-one million, five hundred sixty-four thousand, two hundred thirty-three".