133031501531 has 4 divisors (see below), whose sum is σ = 140856883992. Its totient is φ = 125206119072.

The previous prime is 133031501509. The next prime is 133031501557. The reversal of 133031501531 is 135105130331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135105130331 = 2027 ⋅66652753.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133031501531 is a prime.

It is a super-2 number, since 2×133031501531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133031501531.

It is not an unprimeable number, because it can be changed into a prime (133031501501) 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, 3912691205 + ... + 3912691238.

It is an arithmetic number, because the mean of its divisors is an integer number (35214220998).

Almost surely, 2^133031501531 is an apocalyptic number.

133031501531 is a deficient number, since it is larger than the sum of its proper divisors (7825382461).

133031501531 is an equidigital number, since it uses as much as digits as its factorization.

133031501531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7825382460.

The product of its (nonzero) digits is 2025, while the sum is 26.

Adding to 133031501531 its reverse (135105130331), we get a palindrome (268136631862).

The spelling of 133031501531 in words is "one hundred thirty-three billion, thirty-one million, five hundred one thousand, five hundred thirty-one".