31426431 has 8 divisors (see below), whose sum is σ = 43034544. Its totient is φ = 20384640.

The previous prime is 31426411. The next prime is 31426471. The reversal of 31426431 is 13462413.

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

It is not a de Polignac number, because 31426431 - 2¹⁴ = 31410047 is a prime.

It is a super-2 number, since 2×31426431² = 1975241130795522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31426411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141450 + ... + 141671.

It is an arithmetic number, because the mean of its divisors is an integer number (5379318).

Almost surely, 2^31426431 is an apocalyptic number.

31426431 is a deficient number, since it is larger than the sum of its proper divisors (11608113).

31426431 is a wasteful number, since it uses less digits than its factorization.

31426431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283161.

The product of its digits is 1728, while the sum is 24.

The square root of 31426431 is about 5605.9282014667. The cubic root of 31426431 is about 315.5719214210.

Adding to 31426431 its reverse (13462413), we get a palindrome (44888844).

The spelling of 31426431 in words is "thirty-one million, four hundred twenty-six thousand, four hundred thirty-one".