2157077140 has 12 divisors (see below), whose sum is σ = 4529862036. Its totient is φ = 862830848.

The previous prime is 2157077119. The next prime is 2157077141. The reversal of 2157077140 is 417707512.

It can be written as a sum of positive squares in 2 ways, for example, as 466387216 + 1690689924 = 21596^2 + 41118^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2157077096 and 2157077105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157077141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53926909 + ... + 53926948.

It is an arithmetic number, because the mean of its divisors is an integer number (377488503).

Almost surely, 2^2157077140 is an apocalyptic number.

2157077140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2157077140 is an abundant number, since it is smaller than the sum of its proper divisors (2372784896).

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

2157077140 is a wasteful number, since it uses less digits than its factorization.

2157077140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107853866 (or 107853864 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 34.

The square root of 2157077140 is about 46444.3445426889. The cubic root of 2157077140 is about 1292.0774849931.

The spelling of 2157077140 in words is "two billion, one hundred fifty-seven million, seventy-seven thousand, one hundred forty".