2154156434 has 8 divisors (see below), whose sum is σ = 3286001520. Its totient is φ = 1058822596.

The previous prime is 2154156419. The next prime is 2154156449. The reversal of 2154156434 is 4346514512.

It is an interprime number because it is at equal distance from previous prime (2154156419) and next prime (2154156449).

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 = 2154156394 and 2154156403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9127664 + ... + 9127899.

It is an arithmetic number, because the mean of its divisors is an integer number (410750190).

Almost surely, 2^2154156434 is an apocalyptic number.

2154156434 is a deficient number, since it is larger than the sum of its proper divisors (1131845086).

2154156434 is a wasteful number, since it uses less digits than its factorization.

2154156434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18255624.

The product of its digits is 57600, while the sum is 35.

The square root of 2154156434 is about 46412.8908170995. The cubic root of 2154156434 is about 1291.4940592513.

The spelling of 2154156434 in words is "two billion, one hundred fifty-four million, one hundred fifty-six thousand, four hundred thirty-four".