2157830518 has 4 divisors (see below), whose sum is σ = 3236745780. Its totient is φ = 1078915258.

The previous prime is 2157830497. The next prime is 2157830561. The reversal of 2157830518 is 8150387512.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539457628 + ... + 539457631.

It is an arithmetic number, because the mean of its divisors is an integer number (809186445).

Almost surely, 2^2157830518 is an apocalyptic number.

2157830518 is a deficient number, since it is larger than the sum of its proper divisors (1078915262).

2157830518 is a wasteful number, since it uses less digits than its factorization.

2157830518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078915261.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 2157830518 is about 46452.4543807967. The cubic root of 2157830518 is about 1292.2278905936.

The spelling of 2157830518 in words is "two billion, one hundred fifty-seven million, eight hundred thirty thousand, five hundred eighteen".