61520244 has 48 divisors (see below), whose sum is σ = 150743040. Its totient is φ = 19501920.

The previous prime is 61520243. The next prime is 61520257. The reversal of 61520244 is 44202516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61520243) 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, 20547 + ... + 23349.

It is an arithmetic number, because the mean of its divisors is an integer number (3140480).

Almost surely, 2^61520244 is an apocalyptic number.

It is an amenable number.

61520244 is an abundant number, since it is smaller than the sum of its proper divisors (89222796).

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

61520244 is a wasteful number, since it uses less digits than its factorization.

61520244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900 (or 2898 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 61520244 is about 7843.4841747785. The cubic root of 61520244 is about 394.7656442441.

The spelling of 61520244 in words is "sixty-one million, five hundred twenty thousand, two hundred forty-four".