133542752531 has 4 divisors (see below), whose sum is σ = 135233167200. Its totient is φ = 131852337864.

The previous prime is 133542752509. The next prime is 133542752573. The reversal of 133542752531 is 135257245331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133542752531 is a prime.

It is a super-2 number, since 2×133542752531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133542752131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845207216 + ... + 845207373.

It is an arithmetic number, because the mean of its divisors is an integer number (33808291800).

Almost surely, 2^133542752531 is an apocalyptic number.

133542752531 is a deficient number, since it is larger than the sum of its proper divisors (1690414669).

133542752531 is an equidigital number, since it uses as much as digits as its factorization.

133542752531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690414668.

The product of its digits is 378000, while the sum is 41.

Adding to 133542752531 its reverse (135257245331), we get a palindrome (268799997862).

The spelling of 133542752531 in words is "one hundred thirty-three billion, five hundred forty-two million, seven hundred fifty-two thousand, five hundred thirty-one".