133516212461 has 4 divisors (see below), whose sum is σ = 133579824000. Its totient is φ = 133452600924.

The previous prime is 133516212451. The next prime is 133516212469. The reversal of 133516212461 is 164212615331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133516212461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133516212469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31802621 + ... + 31806818.

It is an arithmetic number, because the mean of its divisors is an integer number (33394956000).

Almost surely, 2^133516212461 is an apocalyptic number.

It is an amenable number.

133516212461 is a deficient number, since it is larger than the sum of its proper divisors (63611539).

133516212461 is an equidigital number, since it uses as much as digits as its factorization.

133516212461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63611538.

The product of its digits is 25920, while the sum is 35.

Adding to 133516212461 its reverse (164212615331), we get a palindrome (297728827792).

The spelling of 133516212461 in words is "one hundred thirty-three billion, five hundred sixteen million, two hundred twelve thousand, four hundred sixty-one".