2155440254 has 32 divisors (see below), whose sum is σ = 3747362400. Its totient is φ = 920384640.

The previous prime is 2155440253. The next prime is 2155440269. The reversal of 2155440254 is 4520445512.

It is a self number, because there is not a number n which added to its sum of digits gives 2155440254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155440253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22049 + ... + 69260.

It is an arithmetic number, because the mean of its divisors is an integer number (117105075).

Almost surely, 2^2155440254 is an apocalyptic number.

2155440254 is a deficient number, since it is larger than the sum of its proper divisors (1591922146).

2155440254 is a wasteful number, since it uses less digits than its factorization.

2155440254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91388.

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 2155440254 is about 46426.7191819538. The cubic root of 2155440254 is about 1291.7505736812.

Adding to 2155440254 its reverse (4520445512), we get a palindrome (6675885766).

The spelling of 2155440254 in words is "two billion, one hundred fifty-five million, four hundred forty thousand, two hundred fifty-four".