2157858254 has 8 divisors (see below), whose sum is σ = 3248473368. Its totient is φ = 1075033800.

The previous prime is 2157858247. The next prime is 2157858259. The reversal of 2157858254 is 4528587512.

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

It is a junction number, because it is equal to n+sod(n) for n = 2157858199 and 2157858208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157858259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1946972 + ... + 1948079.

It is an arithmetic number, because the mean of its divisors is an integer number (406059171).

Almost surely, 2^2157858254 is an apocalyptic number.

2157858254 is a deficient number, since it is larger than the sum of its proper divisors (1090615114).

2157858254 is a wasteful number, since it uses less digits than its factorization.

2157858254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3895330.

The product of its digits is 896000, while the sum is 47.

The square root of 2157858254 is about 46452.7529216515. The cubic root of 2157858254 is about 1292.2334271852.

The spelling of 2157858254 in words is "two billion, one hundred fifty-seven million, eight hundred fifty-eight thousand, two hundred fifty-four".