31020001 has 2 divisors, whose sum is σ = 31020002. Its totient is φ = 31020000.

The previous prime is 31019993. The next prime is 31020007. The reversal of 31020001 is 10002013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29419776 + 1600225 = 5424^2 + 1265^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020001 - 2³ = 31019993 is a prime.

It is not a weakly prime, because it can be changed into another prime (31020007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510000 + 15510001.

It is an arithmetic number, because the mean of its divisors is an integer number (15510001).

Almost surely, 2^31020001 is an apocalyptic number.

It is an amenable number.

31020001 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020001 is an equidigital number, since it uses as much as digits as its factorization.

31020001 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 31020001 is about 5569.5602160314. The cubic root of 31020001 is about 314.2056106656.

Adding to 31020001 its reverse (10002013), we get a palindrome (41022014).

The spelling of 31020001 in words is "thirty-one million, twenty thousand, one".