2131090 has 32 divisors (see below), whose sum is σ = 4198320. Its totient is φ = 778752.

The previous prime is 2131081. The next prime is 2131093. The reversal of 2131090 is 901312.

It can be written as a sum of positive squares in 8 ways, for example, as 173889 + 1957201 = 417^2 + 1399^2 .

It is not an unprimeable number, because it can be changed into a prime (2131093) 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, 21922 + ... + 22018.

2^2131090 is an apocalyptic number.

2131090 is a deficient number, since it is larger than the sum of its proper divisors (2067230).

2131090 is an equidigital number, since it uses as much as digits as its factorization.

2131090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 2131090 is about 1459.8253320175. The cubic root of 2131090 is about 128.6867789024.

The spelling of 2131090 in words is "two million, one hundred thirty-one thousand, ninety".