31423001 has 4 divisors (see below), whose sum is σ = 31512372. Its totient is φ = 31333632.

The previous prime is 31422997. The next prime is 31423033. The reversal of 31423001 is 10032413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11397376 + 20025625 = 3376^2 + 4475^2 .

It is a cyclic number.

It is not a de Polignac number, because 31423001 - 2² = 31422997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31423081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44156 + ... + 44861.

It is an arithmetic number, because the mean of its divisors is an integer number (7878093).

Almost surely, 2^31423001 is an apocalyptic number.

It is an amenable number.

31423001 is a deficient number, since it is larger than the sum of its proper divisors (89371).

31423001 is an equidigital number, since it uses as much as digits as its factorization.

31423001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89370.

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

The square root of 31423001 is about 5605.6222669745. The cubic root of 31423001 is about 315.5604400974.

Adding to 31423001 its reverse (10032413), we get a palindrome (41455414).

The spelling of 31423001 in words is "thirty-one million, four hundred twenty-three thousand, one".