61573255 has 4 divisors (see below), whose sum is σ = 73887912. Its totient is φ = 49258600.

The previous prime is 61573249. The next prime is 61573261. The reversal of 61573255 is 55237516.

61573255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (61573249) and next prime (61573261).

It is a de Polignac number, because none of the positive numbers 2^k-61573255 is a prime.

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 61573255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6157321 + ... + 6157330.

It is an arithmetic number, because the mean of its divisors is an integer number (18471978).

Almost surely, 2^61573255 is an apocalyptic number.

61573255 is a deficient number, since it is larger than the sum of its proper divisors (12314657).

61573255 is a wasteful number, since it uses less digits than its factorization.

61573255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12314656.

The product of its digits is 31500, while the sum is 34.

The square root of 61573255 is about 7846.8627488953. The cubic root of 61573255 is about 394.8789994168.

The spelling of 61573255 in words is "sixty-one million, five hundred seventy-three thousand, two hundred fifty-five".