31172002 has 4 divisors (see below), whose sum is σ = 46758006. Its totient is φ = 15586000.

The previous prime is 31171993. The next prime is 31172039. The reversal of 31172002 is 20027113.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 30481441 + 690561 = 5521^2 + 831^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7792999 + ... + 7793002.

Almost surely, 2^31172002 is an apocalyptic number.

31172002 is a deficient number, since it is larger than the sum of its proper divisors (15586004).

31172002 is a wasteful number, since it uses less digits than its factorization.

31172002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15586003.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 31172002 is about 5583.1892319713. The cubic root of 31172002 is about 314.7179872864.

Adding to 31172002 its reverse (20027113), we get a palindrome (51199115).

The spelling of 31172002 in words is "thirty-one million, one hundred seventy-two thousand, two".