31253011 has 2 divisors, whose sum is σ = 31253012. Its totient is φ = 31253010.

The previous prime is 31253009. The next prime is 31253017. The reversal of 31253011 is 11035213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31253011 - 2¹ = 31253009 is a prime.

It is a super-2 number, since 2×31253011² = 1953501393132242, which contains 22 as substring.

Together with 31253009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31253017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15626505 + 15626506.

It is an arithmetic number, because the mean of its divisors is an integer number (15626506).

Almost surely, 2^31253011 is an apocalyptic number.

31253011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31253011 is an equidigital number, since it uses as much as digits as its factorization.

31253011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 31253011 is about 5590.4392492898. The cubic root of 31253011 is about 314.9903784749.

Adding to 31253011 its reverse (11035213), we get a palindrome (42288224).

The spelling of 31253011 in words is "thirty-one million, two hundred fifty-three thousand, eleven".