331040551 has 2 divisors, whose sum is σ = 331040552. Its totient is φ = 331040550.

The previous prime is 331040543. The next prime is 331040557. The reversal of 331040551 is 155040133.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 331040551 - 2³ = 331040543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331040557) 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, 165520275 + 165520276.

It is an arithmetic number, because the mean of its divisors is an integer number (165520276).

Almost surely, 2^331040551 is an apocalyptic number.

331040551 is a deficient number, since it is larger than the sum of its proper divisors (1).

331040551 is an equidigital number, since it uses as much as digits as its factorization.

331040551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 331040551 is about 18194.5198067990. The cubic root of 331040551 is about 691.7678889809.

Adding to 331040551 its reverse (155040133), we get a palindrome (486080684).

The spelling of 331040551 in words is "three hundred thirty-one million, forty thousand, five hundred fifty-one".