2155072503 has 4 divisors (see below), whose sum is σ = 2873430008. Its totient is φ = 1436715000.

The previous prime is 2155072501. The next prime is 2155072519. The reversal of 2155072503 is 3052705512.

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

It is not a de Polignac number, because 2155072503 - 2¹ = 2155072501 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 (2155072501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359178748 + ... + 359178753.

It is an arithmetic number, because the mean of its divisors is an integer number (718357502).

Almost surely, 2^2155072503 is an apocalyptic number.

2155072503 is a deficient number, since it is larger than the sum of its proper divisors (718357505).

2155072503 is an equidigital number, since it uses as much as digits as its factorization.

2155072503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718357504.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 2155072503 is about 46422.7584596176. The cubic root of 2155072503 is about 1291.6771053826.

The spelling of 2155072503 in words is "two billion, one hundred fifty-five million, seventy-two thousand, five hundred three".