2157460993 has 8 divisors (see below), whose sum is σ = 2194184960. Its totient is φ = 2120780880.

The previous prime is 2157460951. The next prime is 2157461011. The reversal of 2157460993 is 3990647512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2157460993 - 2¹⁷ = 2157329921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2157460913) 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, 97246 + ... + 117352.

It is an arithmetic number, because the mean of its divisors is an integer number (274273120).

Almost surely, 2^2157460993 is an apocalyptic number.

It is an amenable number.

2157460993 is a deficient number, since it is larger than the sum of its proper divisors (36723967).

2157460993 is a wasteful number, since it uses less digits than its factorization.

2157460993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21927.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 2157460993 is about 46448.4767565095. The cubic root of 2157460993 is about 1292.1541224010.

The spelling of 2157460993 in words is "two billion, one hundred fifty-seven million, four hundred sixty thousand, nine hundred ninety-three".