2181875093290 has 32 divisors (see below), whose sum is σ = 4023328461264. Its totient is φ = 851428815360.

The previous prime is 2181875093269. The next prime is 2181875093297. The reversal of 2181875093290 is 923905781812.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 668067409 + 2181207025881 = 25847^2 + 1476891^2 .

It is not an unprimeable number, because it can be changed into a prime (2181875093297) 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, 11499472 + ... + 11687668.

Almost surely, 2^{2181875093290} is an apocalyptic number.

2181875093290 is a deficient number, since it is larger than the sum of its proper divisors (1841453367974).

2181875093290 is a wasteful number, since it uses less digits than its factorization.

2181875093290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216522.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 2181875093290 in words is "two trillion, one hundred eighty-one billion, eight hundred seventy-five million, ninety-three thousand, two hundred ninety".