2177315540 has 12 divisors (see below), whose sum is σ = 4572362676. Its totient is φ = 870926208.

The previous prime is 2177315519. The next prime is 2177315617. The reversal of 2177315540 is 455137712.

It can be written as a sum of positive squares in 2 ways, for example, as 463024324 + 1714291216 = 21518^2 + 41404^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2177315540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54432869 + ... + 54432908.

It is an arithmetic number, because the mean of its divisors is an integer number (381030223).

Almost surely, 2^2177315540 is an apocalyptic number.

2177315540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2177315540 is an abundant number, since it is smaller than the sum of its proper divisors (2395047136).

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

2177315540 is a wasteful number, since it uses less digits than its factorization.

2177315540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108865786 (or 108865784 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 2177315540 is about 46661.7138562226. The cubic root of 2177315540 is about 1296.1058099926.

The spelling of 2177315540 in words is "two billion, one hundred seventy-seven million, three hundred fifteen thousand, five hundred forty".