641326151 has 2 divisors, whose sum is σ = 641326152. Its totient is φ = 641326150.

The previous prime is 641326121. The next prime is 641326157. The reversal of 641326151 is 151623146.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641326151 - 2¹⁰ = 641325127 is a prime.

It is a super-2 number, since 2×641326151² = 822598463912949602, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641326157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320663075 + 320663076.

It is an arithmetic number, because the mean of its divisors is an integer number (320663076).

Almost surely, 2^641326151 is an apocalyptic number.

641326151 is a deficient number, since it is larger than the sum of its proper divisors (1).

641326151 is an equidigital number, since it uses as much as digits as its factorization.

641326151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 641326151 is about 25324.4180782106. The cubic root of 641326151 is about 862.3686957156.

Adding to 641326151 its reverse (151623146), we get a palindrome (792949297).

The spelling of 641326151 in words is "six hundred forty-one million, three hundred twenty-six thousand, one hundred fifty-one".