2154156530 has 32 divisors (see below), whose sum is σ = 4166868096. Its totient is φ = 798868224.

The previous prime is 2154156497. The next prime is 2154156541. The reversal of 2154156530 is 356514512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83174 + ... + 105953.

It is an arithmetic number, because the mean of its divisors is an integer number (130214628).

Almost surely, 2^2154156530 is an apocalyptic number.

2154156530 is a deficient number, since it is larger than the sum of its proper divisors (2012711566).

2154156530 is a wasteful number, since it uses less digits than its factorization.

2154156530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189218.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 2154156530 is about 46412.8918512949. The cubic root of 2154156530 is about 1291.4940784365.

The spelling of 2154156530 in words is "two billion, one hundred fifty-four million, one hundred fifty-six thousand, five hundred thirty".