2129631 has 8 divisors (see below), whose sum is σ = 3245184. Its totient is φ = 1216920.

The previous prime is 2129627. The next prime is 2129671. The reversal of 2129631 is 1369212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2129631 - 2² = 2129627 is a prime.

It is a super-2 number, since 2×2129631² = 9070656392322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50685 + ... + 50726.

It is an arithmetic number, because the mean of its divisors is an integer number (405648).

2^2129631 is an apocalyptic number.

2129631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2129631 is a deficient number, since it is larger than the sum of its proper divisors (1115553).

2129631 is a wasteful number, since it uses less digits than its factorization.

2129631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101421.

The product of its digits is 648, while the sum is 24.

The square root of 2129631 is about 1459.3255291401. The cubic root of 2129631 is about 128.6574047521.

The spelling of 2129631 in words is "two million, one hundred twenty-nine thousand, six hundred thirty-one".