133251955217 has 2 divisors, whose sum is σ = 133251955218. Its totient is φ = 133251955216.

The previous prime is 133251955183. The next prime is 133251955223. The reversal of 133251955217 is 712559152331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76995705361 + 56256249856 = 277481^2 + 237184^2 .

It is a cyclic number.

It is not a de Polignac number, because 133251955217 - 2⁶ = 133251955153 is a prime.

It is not a weakly prime, because it can be changed into another prime (133251955247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66625977608 + 66625977609.

It is an arithmetic number, because the mean of its divisors is an integer number (66625977609).

Almost surely, 2^133251955217 is an apocalyptic number.

It is an amenable number.

133251955217 is a deficient number, since it is larger than the sum of its proper divisors (1).

133251955217 is an equidigital number, since it uses as much as digits as its factorization.

133251955217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 283500, while the sum is 44.

The spelling of 133251955217 in words is "one hundred thirty-three billion, two hundred fifty-one million, nine hundred fifty-five thousand, two hundred seventeen".