61513224 has 64 divisors (see below), whose sum is σ = 163952640. Its totient is φ = 19187520.

The previous prime is 61513219. The next prime is 61513261. The reversal of 61513224 is 42231516.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 61513194 and 61513203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24759 + ... + 27129.

It is an arithmetic number, because the mean of its divisors is an integer number (2561760).

Almost surely, 2^61513224 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 61513224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81976320).

61513224 is an abundant number, since it is smaller than the sum of its proper divisors (102439416).

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

61513224 is a wasteful number, since it uses less digits than its factorization.

61513224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450 (or 2446 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 61513224 is about 7843.0366568058. The cubic root of 61513224 is about 394.7506282642.

The spelling of 61513224 in words is "sixty-one million, five hundred thirteen thousand, two hundred twenty-four".