31401423 has 6 divisors (see below), whose sum is σ = 45357624. Its totient is φ = 20934276.

The previous prime is 31401407. The next prime is 31401439. The reversal of 31401423 is 32410413.

It is an interprime number because it is at equal distance from previous prime (31401407) and next prime (31401439).

It is not a de Polignac number, because 31401423 - 2⁴ = 31401407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31401396 and 31401405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401523) 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 5 ways as a sum of consecutive naturals, for example, 1744515 + ... + 1744532.

It is an arithmetic number, because the mean of its divisors is an integer number (7559604).

Almost surely, 2^31401423 is an apocalyptic number.

31401423 is a deficient number, since it is larger than the sum of its proper divisors (13956201).

31401423 is a wasteful number, since it uses less digits than its factorization.

31401423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489053 (or 3489050 counting only the distinct ones).

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

The square root of 31401423 is about 5603.6972616300. The cubic root of 31401423 is about 315.4881923578.

Adding to 31401423 its reverse (32410413), we get a palindrome (63811836).

The spelling of 31401423 in words is "thirty-one million, four hundred one thousand, four hundred twenty-three".