31671401 has 4 divisors (see below), whose sum is σ = 31762500. Its totient is φ = 31580304.

The previous prime is 31671361. The next prime is 31671403. The reversal of 31671401 is 10417613.

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 24245776 + 7425625 = 4924^2 + 2725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31671401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31671403) 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, 45026 + ... + 45723.

It is an arithmetic number, because the mean of its divisors is an integer number (7940625).

Almost surely, 2^31671401 is an apocalyptic number.

It is an amenable number.

31671401 is a deficient number, since it is larger than the sum of its proper divisors (91099).

31671401 is an equidigital number, since it uses as much as digits as its factorization.

31671401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91098.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 31671401 is about 5627.7349795455. The cubic root of 31671401 is about 316.3897643413.

It can be divided in two parts, 316 and 71401, that added together give a palindrome (71717).

The spelling of 31671401 in words is "thirty-one million, six hundred seventy-one thousand, four hundred one".