2543400155 has 16 divisors (see below), whose sum is σ = 3073744800. Its totient is φ = 2020309248.

The previous prime is 2543400113. The next prime is 2543400169. The reversal of 2543400155 is 5510043452.

It is a cyclic number.

It is not a de Polignac number, because 2543400155 - 2¹² = 2543396059 is a prime.

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, 905984 + ... + 908786.

It is an arithmetic number, because the mean of its divisors is an integer number (192109050).

Almost surely, 2^2543400155 is an apocalyptic number.

2543400155 is a deficient number, since it is larger than the sum of its proper divisors (530344645).

2543400155 is a wasteful number, since it uses less digits than its factorization.

2543400155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 2543400155 is about 50432.1341507575. The cubic root of 2543400155 is about 1365.0175374669.

The spelling of 2543400155 in words is "two billion, five hundred forty-three million, four hundred thousand, one hundred fifty-five".