61522224 has 80 divisors (see below), whose sum is σ = 165986400. Its totient is φ = 19611648.

The previous prime is 61522213. The next prime is 61522261. The reversal of 61522224 is 42222516.

It is a happy number.

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 = 61522194 and 61522203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268542 + ... + 268770.

It is an arithmetic number, because the mean of its divisors is an integer number (2074830).

Almost surely, 2^61522224 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 61522224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82993200).

61522224 is an abundant number, since it is smaller than the sum of its proper divisors (104464176).

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

61522224 is a wasteful number, since it uses less digits than its factorization.

61522224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 456 counting only the distinct ones).

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

The square root of 61522224 is about 7843.6103931799. The cubic root of 61522224 is about 394.7698793140.

The spelling of 61522224 in words is "sixty-one million, five hundred twenty-two thousand, two hundred twenty-four".