531921251 has 2 divisors, whose sum is σ = 531921252. Its totient is φ = 531921250.

The previous prime is 531921217. The next prime is 531921263. The reversal of 531921251 is 152129135.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531921251 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (531921751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265960625 + 265960626.

It is an arithmetic number, because the mean of its divisors is an integer number (265960626).

Almost surely, 2^531921251 is an apocalyptic number.

531921251 is a deficient number, since it is larger than the sum of its proper divisors (1).

531921251 is an equidigital number, since it uses as much as digits as its factorization.

531921251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 29.

The square root of 531921251 is about 23063.4180250890. The cubic root of 531921251 is about 810.2439193256.

The spelling of 531921251 in words is "five hundred thirty-one million, nine hundred twenty-one thousand, two hundred fifty-one".