2154765903 has 4 divisors (see below), whose sum is σ = 2873021208. Its totient is φ = 1436510600.

The previous prime is 2154765883. The next prime is 2154765911. The reversal of 2154765903 is 3095674512.

2154765903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2154765903 - 2⁶ = 2154765839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154765913) 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, 359127648 + ... + 359127653.

It is an arithmetic number, because the mean of its divisors is an integer number (718255302).

Almost surely, 2^2154765903 is an apocalyptic number.

2154765903 is a deficient number, since it is larger than the sum of its proper divisors (718255305).

2154765903 is an equidigital number, since it uses as much as digits as its factorization.

2154765903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718255304.

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 2154765903 is about 46419.4560825523. The cubic root of 2154765903 is about 1291.6158472761.

The spelling of 2154765903 in words is "two billion, one hundred fifty-four million, seven hundred sixty-five thousand, nine hundred three".