2031399 has 20 divisors (see below), whose sum is σ = 3136320. Its totient is φ = 1308960.

The previous prime is 2031397. The next prime is 2031409. The reversal of 2031399 is 9931302.

It is not a de Polignac number, because 2031399 - 2¹ = 2031397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031391) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2107 + ... + 2915.

It is an arithmetic number, because the mean of its divisors is an integer number (156816).

2^2031399 is an apocalyptic number.

2031399 is a deficient number, since it is larger than the sum of its proper divisors (1104921).

2031399 is an equidigital number, since it uses as much as digits as its factorization.

2031399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852 (or 843 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 2031399 is about 1425.2715530733. The cubic root of 2031399 is about 126.6480220326.

The spelling of 2031399 in words is "two million, thirty-one thousand, three hundred ninety-nine".