511020149 has 2 divisors, whose sum is σ = 511020150. Its totient is φ = 511020148.

The previous prime is 511020121. The next prime is 511020161. The reversal of 511020149 is 941020115.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408646225 + 102373924 = 20215^2 + 10118^2 .

It is a cyclic number.

It is not a de Polignac number, because 511020149 - 2⁸ = 511019893 is a prime.

It is a super-2 number, since 2×511020149² = 522283185367964402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511020179) 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, 255510074 + 255510075.

It is an arithmetic number, because the mean of its divisors is an integer number (255510075).

Almost surely, 2^511020149 is an apocalyptic number.

It is an amenable number.

511020149 is a deficient number, since it is larger than the sum of its proper divisors (1).

511020149 is an equidigital number, since it uses as much as digits as its factorization.

511020149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 511020149 is about 22605.7547761626. The cubic root of 511020149 is about 799.4893350335.

The spelling of 511020149 in words is "five hundred eleven million, twenty thousand, one hundred forty-nine".