2351391 has 16 divisors (see below), whose sum is σ = 3671808. Its totient is φ = 1310400.

The previous prime is 2351357. The next prime is 2351441. The reversal of 2351391 is 1931532.

It is a happy number.

It is not a de Polignac number, because 2351391 - 2⁷ = 2351263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2351351) 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, 505 + ... + 2226.

It is an arithmetic number, because the mean of its divisors is an integer number (229488).

2^2351391 is an apocalyptic number.

2351391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2351391 is a deficient number, since it is larger than the sum of its proper divisors (1320417).

2351391 is a wasteful number, since it uses less digits than its factorization.

2351391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782.

The product of its digits is 810, while the sum is 24.

The square root of 2351391 is about 1533.4245987332. The cubic root of 2351391 is about 132.9765161017.

The spelling of 2351391 in words is "two million, three hundred fifty-one thousand, three hundred ninety-one".