331643051 has 2 divisors, whose sum is σ = 331643052. Its totient is φ = 331643050.

The previous prime is 331643033. The next prime is 331643063. The reversal of 331643051 is 150346133.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331643051 is a prime.

It is a super-2 number, since 2×331643051² = 219974226553177202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 331643051.

It is not a weakly prime, because it can be changed into another prime (331643951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165821525 + 165821526.

It is an arithmetic number, because the mean of its divisors is an integer number (165821526).

Almost surely, 2^331643051 is an apocalyptic number.

331643051 is a deficient number, since it is larger than the sum of its proper divisors (1).

331643051 is an equidigital number, since it uses as much as digits as its factorization.

331643051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 331643051 is about 18211.0694633786. The cubic root of 331643051 is about 692.1873114675.

Adding to 331643051 its reverse (150346133), we get a palindrome (481989184).

The spelling of 331643051 in words is "three hundred thirty-one million, six hundred forty-three thousand, fifty-one".