511002991 has 2 divisors, whose sum is σ = 511002992. Its totient is φ = 511002990.

The previous prime is 511002971. The next prime is 511003019. The reversal of 511002991 is 199200115.

It is an a-pointer prime, because the next prime (511003019) can be obtained adding 511002991 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 511002991 - 2⁵ = 511002959 is a prime.

It is a super-2 number, since 2×511002991² = 522248113621892162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511002901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255501495 + 255501496.

It is an arithmetic number, because the mean of its divisors is an integer number (255501496).

Almost surely, 2^511002991 is an apocalyptic number.

511002991 is a deficient number, since it is larger than the sum of its proper divisors (1).

511002991 is an equidigital number, since it uses as much as digits as its factorization.

511002991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 511002991 is about 22605.3752678428. The cubic root of 511002991 is about 799.4803870552.

The spelling of 511002991 in words is "five hundred eleven million, two thousand, nine hundred ninety-one".