31420323 has 24 divisors (see below), whose sum is σ = 51667200. Its totient is φ = 18213360.

The previous prime is 31420313. The next prime is 31420327. The reversal of 31420323 is 32302413.

It is not a de Polignac number, because 31420323 - 2⁹ = 31419811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31420296 and 31420305.

It is not an unprimeable number, because it can be changed into a prime (31420327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4623 + ... + 9176.

It is an arithmetic number, because the mean of its divisors is an integer number (2152800).

Almost surely, 2^31420323 is an apocalyptic number.

31420323 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31420323 is a deficient number, since it is larger than the sum of its proper divisors (20246877).

31420323 is a wasteful number, since it uses less digits than its factorization.

31420323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13839 (or 13836 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 31420323 is about 5605.3833945592. The cubic root of 31420323 is about 315.5514753811.

Adding to 31420323 its reverse (32302413), we get a palindrome (63722736).

The spelling of 31420323 in words is "thirty-one million, four hundred twenty thousand, three hundred twenty-three".