61712224 has 72 divisors (see below), whose sum is σ = 143110800. Its totient is φ = 25659648.

The previous prime is 61712207. The next prime is 61712237. The reversal of 61712224 is 42221716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 414102 + ... + 414250.

It is an arithmetic number, because the mean of its divisors is an integer number (1987650).

Almost surely, 2^61712224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61712224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71555400).

61712224 is an abundant number, since it is smaller than the sum of its proper divisors (81398576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61712224 is a wasteful number, since it uses less digits than its factorization.

61712224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 201 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 61712224 is about 7855.7128257084. The cubic root of 61712224 is about 395.1758529068.

The spelling of 61712224 in words is "sixty-one million, seven hundred twelve thousand, two hundred twenty-four".