31434631 has 4 divisors (see below), whose sum is σ = 31445872. Its totient is φ = 31423392.

The previous prime is 31434617. The next prime is 31434643. The reversal of 31434631 is 13643413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31434631 - 2⁷ = 31434503 is a prime.

It is a super-2 number, since 2×31434631² = 1976272052212322, 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 = 31434596 and 31434605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31434691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2230 + ... + 8236.

It is an arithmetic number, because the mean of its divisors is an integer number (7861468).

Almost surely, 2^31434631 is an apocalyptic number.

31434631 is a deficient number, since it is larger than the sum of its proper divisors (11241).

31434631 is an equidigital number, since it uses as much as digits as its factorization.

31434631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11240.

The product of its digits is 2592, while the sum is 25.

The square root of 31434631 is about 5606.6595223894. The cubic root of 31434631 is about 315.5993660978.

The spelling of 31434631 in words is "thirty-one million, four hundred thirty-four thousand, six hundred thirty-one".