2159297540 has 12 divisors (see below), whose sum is σ = 4534524876. Its totient is φ = 863719008.

The previous prime is 2159297527. The next prime is 2159297603. The reversal of 2159297540 is 457929512.

It can be written as a sum of positive squares in 2 ways, for example, as 1194946624 + 964350916 = 34568^2 + 31054^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2159297491 and 2159297500.

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, 53982419 + ... + 53982458.

It is an arithmetic number, because the mean of its divisors is an integer number (377877073).

Almost surely, 2^2159297540 is an apocalyptic number.

2159297540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2159297540 is an abundant number, since it is smaller than the sum of its proper divisors (2375227336).

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

2159297540 is a wasteful number, since it uses less digits than its factorization.

2159297540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107964886 (or 107964884 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 2159297540 is about 46468.2422736217. The cubic root of 2159297540 is about 1292.5206688079.

The spelling of 2159297540 in words is "two billion, one hundred fifty-nine million, two hundred ninety-seven thousand, five hundred forty".