510131261 has 2 divisors, whose sum is σ = 510131262. Its totient is φ = 510131260.

The previous prime is 510131221. The next prime is 510131263. The reversal of 510131261 is 162131015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485320900 + 24810361 = 22030^2 + 4981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-510131261 is a prime.

Together with 510131263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (510131263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255065630 + 255065631.

It is an arithmetic number, because the mean of its divisors is an integer number (255065631).

Almost surely, 2^510131261 is an apocalyptic number.

It is an amenable number.

510131261 is a deficient number, since it is larger than the sum of its proper divisors (1).

510131261 is an equidigital number, since it uses as much as digits as its factorization.

510131261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 510131261 is about 22586.0855616904. The cubic root of 510131261 is about 799.0255118856.

Adding to 510131261 its reverse (162131015), we get a palindrome (672262276).

The spelling of 510131261 in words is "five hundred ten million, one hundred thirty-one thousand, two hundred sixty-one".