30621315252 has 96 divisors (see below), whose sum is σ = 79214929920. Its totient is φ = 9128401920.

The previous prime is 30621315251. The next prime is 30621315281. The reversal of 30621315252 is 25251312603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30621315251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8214213 + ... + 8217939.

It is an arithmetic number, because the mean of its divisors is an integer number (825155520).

Almost surely, 2^30621315252 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 30621315252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39607464960).

30621315252 is an abundant number, since it is smaller than the sum of its proper divisors (48593614668).

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

30621315252 is a wasteful number, since it uses less digits than its factorization.

30621315252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4741 (or 4739 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 30621315252 its reverse (25251312603), we get a palindrome (55872627855).

The spelling of 30621315252 in words is "thirty billion, six hundred twenty-one million, three hundred fifteen thousand, two hundred fifty-two".