31814164 has 6 divisors (see below), whose sum is σ = 55674794. Its totient is φ = 15907080.

The previous prime is 31814161. The next prime is 31814171. The reversal of 31814164 is 46141813.

It can be written as a sum of positive squares in only one way, i.e., 20322064 + 11492100 = 4508^2 + 3390^2 .

It is a super-3 number, since 3×31814164³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31814161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3976767 + ... + 3976774.

Almost surely, 2^31814164 is an apocalyptic number.

It is an amenable number.

31814164 is a deficient number, since it is larger than the sum of its proper divisors (23860630).

31814164 is a wasteful number, since it uses less digits than its factorization.

31814164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7953545 (or 7953543 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 31814164 is about 5640.4045954169. The cubic root of 31814164 is about 316.8644413046.

Adding to 31814164 its reverse (46141813), we get a palindrome (77955977).

The spelling of 31814164 in words is "thirty-one million, eight hundred fourteen thousand, one hundred sixty-four".