2157770752 has 96 divisors (see below), whose sum is σ = 4564123200. Its totient is φ = 1018200064.

The previous prime is 2157770729. The next prime is 2157770753. The reversal of 2157770752 is 2570777512.

It is a junction number, because it is equal to n+sod(n) for n = 2157770699 and 2157770708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157770753) 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, 2791038 + ... + 2791810.

It is an arithmetic number, because the mean of its divisors is an integer number (47542950).

Almost surely, 2^2157770752 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 2157770752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2282061600).

2157770752 is an abundant number, since it is smaller than the sum of its proper divisors (2406352448).

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

2157770752 is an equidigital number, since it uses as much as digits as its factorization.

2157770752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 240100, while the sum is 43.

The square root of 2157770752 is about 46451.8110734124. The cubic root of 2157770752 is about 1292.2159600914.

It can be divided in two parts, 21577 and 70752, that added together give a palindrome (92329).

The spelling of 2157770752 in words is "two billion, one hundred fifty-seven million, seven hundred seventy thousand, seven hundred fifty-two".