61231520224 has 48 divisors (see below), whose sum is σ = 141494478048. Its totient is φ = 25532831232.

The previous prime is 61231520213. The next prime is 61231520239. The reversal of 61231520224 is 42202513216.

61231520224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 61231520192 and 61231520201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3685699 + ... + 3702274.

It is an arithmetic number, because the mean of its divisors is an integer number (2947801626).

Almost surely, 2^61231520224 is an apocalyptic number.

It is an amenable number.

61231520224 is an abundant number, since it is smaller than the sum of its proper divisors (80262957824).

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

61231520224 is a wasteful number, since it uses less digits than its factorization.

61231520224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7388027 (or 7388019 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 61231520224 in words is "sixty-one billion, two hundred thirty-one million, five hundred twenty thousand, two hundred twenty-four".