721052131 has 2 divisors, whose sum is σ = 721052132. Its totient is φ = 721052130.

The previous prime is 721052083. The next prime is 721052141. The reversal of 721052131 is 131250127.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (131250127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 721052131 - 2¹⁵ = 721019363 is a prime.

It is a super-2 number, since 2×721052131² = 1039832351239282322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (721052141) 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, 360526065 + 360526066.

It is an arithmetic number, because the mean of its divisors is an integer number (360526066).

Almost surely, 2^721052131 is an apocalyptic number.

721052131 is a deficient number, since it is larger than the sum of its proper divisors (1).

721052131 is an equidigital number, since it uses as much as digits as its factorization.

721052131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 721052131 is about 26852.4138765959. The cubic root of 721052131 is about 896.7173132042.

The spelling of 721052131 in words is "seven hundred twenty-one million, fifty-two thousand, one hundred thirty-one".