2157492238 has 16 divisors (see below), whose sum is σ = 3531178800. Its totient is φ = 980473600.

The previous prime is 2157492223. The next prime is 2157492241. The reversal of 2157492238 is 8322947512.

It is a junction number, because it is equal to n+sod(n) for n = 2157492194 and 2157492203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161868 + ... + 174688.

It is an arithmetic number, because the mean of its divisors is an integer number (220698675).

Almost surely, 2^2157492238 is an apocalyptic number.

2157492238 is a deficient number, since it is larger than the sum of its proper divisors (1373686562).

2157492238 is a wasteful number, since it uses less digits than its factorization.

2157492238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20483.

The product of its digits is 241920, while the sum is 43.

The square root of 2157492238 is about 46448.8130957078. The cubic root of 2157492238 is about 1292.1603601593.

The spelling of 2157492238 in words is "two billion, one hundred fifty-seven million, four hundred ninety-two thousand, two hundred thirty-eight".