133250521 has 2 divisors, whose sum is σ = 133250522. Its totient is φ = 133250520.

The previous prime is 133250519. The next prime is 133250531. The reversal of 133250521 is 125052331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101203600 + 32046921 = 10060^2 + 5661^2 .

It is a cyclic number.

It is not a de Polignac number, because 133250521 - 2¹ = 133250519 is a prime.

Together with 133250519, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 133250492 and 133250501.

It is not a weakly prime, because it can be changed into another prime (133250531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66625260 + 66625261.

It is an arithmetic number, because the mean of its divisors is an integer number (66625261).

Almost surely, 2^133250521 is an apocalyptic number.

It is an amenable number.

133250521 is a deficient number, since it is larger than the sum of its proper divisors (1).

133250521 is an equidigital number, since it uses as much as digits as its factorization.

133250521 is an evil number, because the sum of its binary digits is even.

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

The square root of 133250521 is about 11543.4189476082. The cubic root of 133250521 is about 510.7671665710.

The spelling of 133250521 in words is "one hundred thirty-three million, two hundred fifty thousand, five hundred twenty-one".