2155400214 has 16 divisors (see below), whose sum is σ = 4702691520. Its totient is φ = 653151560.

The previous prime is 2155400207. The next prime is 2155400239. The reversal of 2155400214 is 4120045512.

It is a super-2 number, since 2×2155400214² = 9291500165022491592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16328724 + ... + 16328855.

It is an arithmetic number, because the mean of its divisors is an integer number (293918220).

Almost surely, 2^2155400214 is an apocalyptic number.

2155400214 is an abundant number, since it is smaller than the sum of its proper divisors (2547291306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155400214 is a wasteful number, since it uses less digits than its factorization.

2155400214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32657595.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 2155400214 is about 46426.2879627480. The cubic root of 2155400214 is about 1291.7425750039.

Adding to 2155400214 its reverse (4120045512), we get a palindrome (6275445726).

The spelling of 2155400214 in words is "two billion, one hundred fifty-five million, four hundred thousand, two hundred fourteen".