133642513 has 2 divisors, whose sum is σ = 133642514. Its totient is φ = 133642512.

The previous prime is 133642477. The next prime is 133642577. The reversal of 133642513 is 315246331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115605504 + 18037009 = 10752^2 + 4247^2 .

It is a cyclic number.

It is not a de Polignac number, because 133642513 - 2²⁵ = 100088081 is a prime.

It is not a weakly prime, because it can be changed into another prime (133642013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66821256 + 66821257.

It is an arithmetic number, because the mean of its divisors is an integer number (66821257).

Almost surely, 2^133642513 is an apocalyptic number.

It is an amenable number.

133642513 is a deficient number, since it is larger than the sum of its proper divisors (1).

133642513 is an equidigital number, since it uses as much as digits as its factorization.

133642513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

The square root of 133642513 is about 11560.3855039527. The cubic root of 133642513 is about 511.2675289252.

Adding to 133642513 its reverse (315246331), we get a palindrome (448888844).

The spelling of 133642513 in words is "one hundred thirty-three million, six hundred forty-two thousand, five hundred thirteen".