2155240351 has 4 divisors (see below), whose sum is σ = 2351171304. Its totient is φ = 1959309400.

The previous prime is 2155240309. The next prime is 2155240361. The reversal of 2155240351 is 1530425512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2155240351 - 2⁷ = 2155240223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155240361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97965460 + ... + 97965481.

It is an arithmetic number, because the mean of its divisors is an integer number (587792826).

Almost surely, 2^2155240351 is an apocalyptic number.

2155240351 is a deficient number, since it is larger than the sum of its proper divisors (195930953).

2155240351 is a wasteful number, since it uses less digits than its factorization.

2155240351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195930952.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2155240351 is about 46424.5662446080. The cubic root of 2155240351 is about 1291.7106386381.

Adding to 2155240351 its reverse (1530425512), we get a palindrome (3685665863).

The spelling of 2155240351 in words is "two billion, one hundred fifty-five million, two hundred forty thousand, three hundred fifty-one".