665152031 has 2 divisors, whose sum is σ = 665152032. Its totient is φ = 665152030.

The previous prime is 665152001. The next prime is 665152043. The reversal of 665152031 is 130251566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665152031 - 2⁶ = 665151967 is a prime.

It is a super-2 number, since 2×665152031² = 884854448686849922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665151985 and 665152003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665152001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332576015 + 332576016.

It is an arithmetic number, because the mean of its divisors is an integer number (332576016).

Almost surely, 2^665152031 is an apocalyptic number.

665152031 is a deficient number, since it is larger than the sum of its proper divisors (1).

665152031 is an equidigital number, since it uses as much as digits as its factorization.

665152031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 665152031 is about 25790.5415026517. The cubic root of 665152031 is about 872.9183850133.

The spelling of 665152031 in words is "six hundred sixty-five million, one hundred fifty-two thousand, thirty-one".