31002001 has 2 divisors, whose sum is σ = 31002002. Its totient is φ = 31002000.

The previous prime is 31001989. The next prime is 31002007. The reversal of 31002001 is 10020013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23049601 + 7952400 = 4801^2 + 2820^2 .

It is an emirp because it is prime and its reverse (10020013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31002001 - 2¹¹ = 30999953 is a prime.

It is a super-2 number, since 2×31002001² = 1922248132008002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31002007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15501000 + 15501001.

It is an arithmetic number, because the mean of its divisors is an integer number (15501001).

Almost surely, 2^31002001 is an apocalyptic number.

It is an amenable number.

31002001 is a deficient number, since it is larger than the sum of its proper divisors (1).

31002001 is an equidigital number, since it uses as much as digits as its factorization.

31002001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 31002001 is about 5567.9440550350. The cubic root of 31002001 is about 314.1448241289.

Adding to 31002001 its reverse (10020013), we get a palindrome (41022014).

It can be divided in two parts, 3 and 1002001, that multiplied together give a palindrome (3006003).

The spelling of 31002001 in words is "thirty-one million, two thousand, one".