31401023 has 8 divisors (see below), whose sum is σ = 33704928. Its totient is φ = 29147904.

The previous prime is 31401017. The next prime is 31401037. The reversal of 31401023 is 32010413.

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

It is a cyclic number.

It is not a de Polignac number, because 31401023 - 2⁶ = 31400959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31400989 and 31401007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401043) 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, 11411 + ... + 13892.

It is an arithmetic number, because the mean of its divisors is an integer number (4213116).

Almost surely, 2^31401023 is an apocalyptic number.

31401023 is a deficient number, since it is larger than the sum of its proper divisors (2303905).

31401023 is a wasteful number, since it uses less digits than its factorization.

31401023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25393.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31401023 is about 5603.6615707946. The cubic root of 31401023 is about 315.4868527602.

Adding to 31401023 its reverse (32010413), we get a palindrome (63411436).

The spelling of 31401023 in words is "thirty-one million, four hundred one thousand, twenty-three".