133123603501531 has 4 divisors (see below), whose sum is σ = 140130108949000. Its totient is φ = 126117098054064.

The previous prime is 133123603501523. The next prime is 133123603501589. The reversal of 133123603501531 is 135105306321331.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 133123603501531 - 2³ = 133123603501523 is a prime.

It is a super-2 number, since 2×133123603501531² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133123603501831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3503252723706 + ... + 3503252723743.

It is an arithmetic number, because the mean of its divisors is an integer number (35032527237250).

Almost surely, 2^{133123603501531} is an apocalyptic number.

133123603501531 is a deficient number, since it is larger than the sum of its proper divisors (7006505447469).

133123603501531 is an equidigital number, since it uses as much as digits as its factorization.

133123603501531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7006505447468.

The product of its (nonzero) digits is 72900, while the sum is 37.

Adding to 133123603501531 its reverse (135105306321331), we get a palindrome (268228909822862).

The spelling of 133123603501531 in words is "one hundred thirty-three trillion, one hundred twenty-three billion, six hundred three million, five hundred one thousand, five hundred thirty-one".