531656149 has 2 divisors, whose sum is σ = 531656150. Its totient is φ = 531656148.

The previous prime is 531656123. The next prime is 531656179. The reversal of 531656149 is 941656135.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 485320900 + 46335249 = 22030^2 + 6807^2 .

It is a cyclic number.

It is not a de Polignac number, because 531656149 - 2¹³ = 531647957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531656179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265828074 + 265828075.

It is an arithmetic number, because the mean of its divisors is an integer number (265828075).

Almost surely, 2^531656149 is an apocalyptic number.

It is an amenable number.

531656149 is a deficient number, since it is larger than the sum of its proper divisors (1).

531656149 is an equidigital number, since it uses as much as digits as its factorization.

531656149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 40.

The square root of 531656149 is about 23057.6700687645. The cubic root of 531656149 is about 810.1092922689.

The spelling of 531656149 in words is "five hundred thirty-one million, six hundred fifty-six thousand, one hundred forty-nine".