31423401 has 12 divisors (see below), whose sum is σ = 46355712. Its totient is φ = 20502936.

The previous prime is 31423391. The next prime is 31423421. The reversal of 31423401 is 10432413.

It is not a de Polignac number, because 31423401 - 2⁵ = 31423369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31423421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36721 + ... + 37566.

It is an arithmetic number, because the mean of its divisors is an integer number (3862976).

Almost surely, 2^31423401 is an apocalyptic number.

It is an amenable number.

31423401 is a deficient number, since it is larger than the sum of its proper divisors (14932311).

31423401 is a wasteful number, since it uses less digits than its factorization.

31423401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74340 (or 74337 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31423401 is about 5605.6579453263. The cubic root of 31423401 is about 315.5617790703.

Adding to 31423401 its reverse (10432413), we get a palindrome (41855814).

The spelling of 31423401 in words is "thirty-one million, four hundred twenty-three thousand, four hundred one".