2142631 has 4 divisors (see below), whose sum is σ = 2183112. Its totient is φ = 2102152.

The previous prime is 2142601. The next prime is 2142641. The reversal of 2142631 is 1362412.

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 2142631 - 2¹³ = 2134439 is a prime.

It is a super-2 number, since 2×2142631² = 9181735204322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2142599 and 2142608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142601) 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, 20161 + ... + 20266.

It is an arithmetic number, because the mean of its divisors is an integer number (545778).

2^2142631 is an apocalyptic number.

2142631 is a deficient number, since it is larger than the sum of its proper divisors (40481).

2142631 is an equidigital number, since it uses as much as digits as its factorization.

2142631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40480.

The product of its digits is 288, while the sum is 19.

The square root of 2142631 is about 1463.7728648940. The cubic root of 2142631 is about 128.9186635477.

The spelling of 2142631 in words is "two million, one hundred forty-two thousand, six hundred thirty-one".