2155438934 has 8 divisors (see below), whose sum is σ = 3527081928. Its totient is φ = 979744960.

The previous prime is 2155438931. The next prime is 2155438969. The reversal of 2155438934 is 4398345512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155438931) 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, 48987227 + ... + 48987270.

It is an arithmetic number, because the mean of its divisors is an integer number (440885241).

Almost surely, 2^2155438934 is an apocalyptic number.

2155438934 is a deficient number, since it is larger than the sum of its proper divisors (1371642994).

2155438934 is a wasteful number, since it uses less digits than its factorization.

2155438934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97974510.

The product of its digits is 518400, while the sum is 44.

The square root of 2155438934 is about 46426.7049659999. The cubic root of 2155438934 is about 1291.7503099901.

The spelling of 2155438934 in words is "two billion, one hundred fifty-five million, four hundred thirty-eight thousand, nine hundred thirty-four".