61573263 has 4 divisors (see below), whose sum is σ = 82097688. Its totient is φ = 41048840.

The previous prime is 61573261. The next prime is 61573273. The reversal of 61573263 is 36237516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61573263 - 2¹ = 61573261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61573261) 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, 10262208 + ... + 10262213.

It is an arithmetic number, because the mean of its divisors is an integer number (20524422).

Almost surely, 2^61573263 is an apocalyptic number.

61573263 is a deficient number, since it is larger than the sum of its proper divisors (20524425).

61573263 is a wasteful number, since it uses less digits than its factorization.

61573263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20524424.

The product of its digits is 22680, while the sum is 33.

The square root of 61573263 is about 7846.8632586531. The cubic root of 61573263 is about 394.8790165186.

The spelling of 61573263 in words is "sixty-one million, five hundred seventy-three thousand, two hundred sixty-three".