5273551991 has 2 divisors, whose sum is σ = 5273551992. Its totient is φ = 5273551990.

The previous prime is 5273551981. The next prime is 5273552057. The reversal of 5273551991 is 1991553725.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5273551991 - 2²⁶ = 5206443127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5273551961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2636775995 + 2636775996.

It is an arithmetic number, because the mean of its divisors is an integer number (2636775996).

Almost surely, 2^5273551991 is an apocalyptic number.

5273551991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5273551991 is an equidigital number, since it uses as much as digits as its factorization.

5273551991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 425250, while the sum is 47.

The square root of 5273551991 is about 72619.2260424194. The cubic root of 5273551991 is about 1740.6084091393.

The spelling of 5273551991 in words is "five billion, two hundred seventy-three million, five hundred fifty-one thousand, nine hundred ninety-one".