2157623354 has 8 divisors (see below), whose sum is σ = 3249864948. Its totient is φ = 1074335040.

The previous prime is 2157623327. The next prime is 2157623381. The reversal of 2157623354 is 4533267512.

It is an interprime number because it is at equal distance from previous prime (2157623327) and next prime (2157623381).

It can be written as a sum of positive squares in 2 ways, for example, as 2070705025 + 86918329 = 45505^2 + 9323^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2237717 + ... + 2238680.

Almost surely, 2^2157623354 is an apocalyptic number.

2157623354 is a deficient number, since it is larger than the sum of its proper divisors (1092241594).

2157623354 is a wasteful number, since it uses less digits than its factorization.

2157623354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4476640.

The product of its digits is 151200, while the sum is 38.

The square root of 2157623354 is about 46450.2244773908. The cubic root of 2157623354 is about 1292.1865355283.

The spelling of 2157623354 in words is "two billion, one hundred fifty-seven million, six hundred twenty-three thousand, three hundred fifty-four".