30120315550 has 24 divisors (see below), whose sum is σ = 60333310296. Its totient is φ = 11121347040.

The previous prime is 30120315541. The next prime is 30120315593. The reversal of 30120315550 is 5551302103.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23168824 + ... + 23170123.

It is an arithmetic number, because the mean of its divisors is an integer number (2513887929).

Almost surely, 2^30120315550 is an apocalyptic number.

30120315550 is an abundant number, since it is smaller than the sum of its proper divisors (30212994746).

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

30120315550 is a wasteful number, since it uses less digits than its factorization.

30120315550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46338972 (or 46338967 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

Adding to 30120315550 its reverse (5551302103), we get a palindrome (35671617653).

The spelling of 30120315550 in words is "thirty billion, one hundred twenty million, three hundred fifteen thousand, five hundred fifty".