16129631 has 4 divisors (see below), whose sum is σ = 18433872. Its totient is φ = 13825392.

The previous prime is 16129627. The next prime is 16129657. The reversal of 16129631 is 13692161.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16129631 - 2² = 16129627 is a prime.

It is a super-2 number, since 2×16129631² = 520329992392322, 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 = 16129594 and 16129603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16129621) 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, 1152110 + ... + 1152123.

It is an arithmetic number, because the mean of its divisors is an integer number (4608468).

Almost surely, 2^16129631 is an apocalyptic number.

16129631 is a deficient number, since it is larger than the sum of its proper divisors (2304241).

16129631 is an equidigital number, since it uses as much as digits as its factorization.

16129631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304240.

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

The square root of 16129631 is about 4016.1711865905. The cubic root of 16129631 is about 252.6629004698.

It can be divided in two parts, 161 and 29631, that added together give a palindrome (29792).

The spelling of 16129631 in words is "sixteen million, one hundred twenty-nine thousand, six hundred thirty-one".