30251440220 has 24 divisors (see below), whose sum is σ = 63590410800. Its totient is φ = 12088692992.

The previous prime is 30251440213. The next prime is 30251440237. The reversal of 30251440220 is 2204415203.

It is a happy number.

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, 721805 + ... + 762564.

It is an arithmetic number, because the mean of its divisors is an integer number (2649600450).

Almost surely, 2^30251440220 is an apocalyptic number.

It is an amenable number.

30251440220 is an abundant number, since it is smaller than the sum of its proper divisors (33338970580).

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

30251440220 is a wasteful number, since it uses less digits than its factorization.

30251440220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485397 (or 1485395 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 30251440220 its reverse (2204415203), we get a palindrome (32455855423).

The spelling of 30251440220 in words is "thirty billion, two hundred fifty-one million, four hundred forty thousand, two hundred twenty".