2157378337 has 8 divisors (see below), whose sum is σ = 2181487616. Its totient is φ = 2133380592.

The previous prime is 2157378331. The next prime is 2157378371. The reversal of 2157378337 is 7338737512.

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 2157378337 - 2³ = 2157378329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2157378331) 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, 11323 + ... + 66655.

It is an arithmetic number, because the mean of its divisors is an integer number (272685952).

Almost surely, 2^2157378337 is an apocalyptic number.

It is an amenable number.

2157378337 is a deficient number, since it is larger than the sum of its proper divisors (24109279).

2157378337 is a wasteful number, since it uses less digits than its factorization.

2157378337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55767.

The product of its digits is 740880, while the sum is 46.

The square root of 2157378337 is about 46447.5869879157. The cubic root of 2157378337 is about 1292.1376206496.

The spelling of 2157378337 in words is "two billion, one hundred fifty-seven million, three hundred seventy-eight thousand, three hundred thirty-seven".