2145091285 has 16 divisors (see below), whose sum is σ = 2668256640. Its totient is φ = 1653547840.

The previous prime is 2145091253. The next prime is 2145091307. The reversal of 2145091285 is 5821905412.

It is not a de Polignac number, because 2145091285 - 2⁵ = 2145091253 is a prime.

It is a congruent number.

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, 58230 + ... + 87640.

It is an arithmetic number, because the mean of its divisors is an integer number (166766040).

Almost surely, 2^2145091285 is an apocalyptic number.

It is an amenable number.

2145091285 is a deficient number, since it is larger than the sum of its proper divisors (523165355).

2145091285 is a wasteful number, since it uses less digits than its factorization.

2145091285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29948.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 2145091285 is about 46315.1301952181. The cubic root of 2145091285 is about 1289.6798847143.

Adding to 2145091285 its reverse (5821905412), we get a palindrome (7966996697).

The spelling of 2145091285 in words is "two billion, one hundred forty-five million, ninety-one thousand, two hundred eighty-five".