2121625550 has 48 divisors (see below), whose sum is σ = 4365684864. Its totient is φ = 760620000.

The previous prime is 2121625531. The next prime is 2121625591. The reversal of 2121625550 is 555261212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11885 + ... + 66215.

It is an arithmetic number, because the mean of its divisors is an integer number (90951768).

Almost surely, 2^2121625550 is an apocalyptic number.

2121625550 is an abundant number, since it is smaller than the sum of its proper divisors (2244059314).

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

2121625550 is a wasteful number, since it uses less digits than its factorization.

2121625550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54425 (or 54420 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 2121625550 is about 46061.1066953455. The cubic root of 2121625550 is about 1284.9599123489.

Adding to 2121625550 its reverse (555261212), we get a palindrome (2676886762).

It can be divided in two parts, 212162 and 5550, that added together give a palindrome (217712).

The spelling of 2121625550 in words is "two billion, one hundred twenty-one million, six hundred twenty-five thousand, five hundred fifty".