2131499 has 4 divisors (see below), whose sum is σ = 2158560. Its totient is φ = 2104440.

The previous prime is 2131483. The next prime is 2131513. The reversal of 2131499 is 9941312.

It is a happy number.

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 2131499 - 2⁴ = 2131483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131429) 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, 13412 + ... + 13569.

It is an arithmetic number, because the mean of its divisors is an integer number (539640).

2^2131499 is an apocalyptic number.

2131499 is a deficient number, since it is larger than the sum of its proper divisors (27061).

2131499 is an equidigital number, since it uses as much as digits as its factorization.

2131499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27060.

The product of its digits is 1944, while the sum is 29.

The square root of 2131499 is about 1459.9654105492. The cubic root of 2131499 is about 128.6950109223.

The spelling of 2131499 in words is "two million, one hundred thirty-one thousand, four hundred ninety-nine".