2252661621 has 8 divisors (see below), whose sum is σ = 3432627264. Its totient is φ = 1287235200.

The previous prime is 2252661617. The next prime is 2252661629. The reversal of 2252661621 is 1261662522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2252661621 - 2² = 2252661617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2252661629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53634780 + ... + 53634821.

It is an arithmetic number, because the mean of its divisors is an integer number (429078408).

Almost surely, 2^2252661621 is an apocalyptic number.

2252661621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2252661621 is a deficient number, since it is larger than the sum of its proper divisors (1179965643).

2252661621 is a wasteful number, since it uses less digits than its factorization.

2252661621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107269611.

The product of its digits is 17280, while the sum is 33.

The square root of 2252661621 is about 47462.2125590453. The cubic root of 2252661621 is about 1310.8871912992.

Subtracting from 2252661621 its reverse (1261662522), we obtain a palindrome (990999099).

The spelling of 2252661621 in words is "two billion, two hundred fifty-two million, six hundred sixty-one thousand, six hundred twenty-one".