133015731 has 8 divisors (see below), whose sum is σ = 179852544. Its totient is φ = 87428040.

The previous prime is 133015691. The next prime is 133015759. The reversal of 133015731 is 137510331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133015731 - 2¹⁸ = 132753587 is a prime.

It is a super-2 number, since 2×133015731² = 35386369386928722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133015031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312031 + ... + 312456.

It is an arithmetic number, because the mean of its divisors is an integer number (22481568).

Almost surely, 2^133015731 is an apocalyptic number.

133015731 is a deficient number, since it is larger than the sum of its proper divisors (46836813).

133015731 is an equidigital number, since it uses as much as digits as its factorization.

133015731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624561.

The product of its (nonzero) digits is 945, while the sum is 24.

The square root of 133015731 is about 11533.2445998513. The cubic root of 133015731 is about 510.4669963184.

The spelling of 133015731 in words is "one hundred thirty-three million, fifteen thousand, seven hundred thirty-one".