133515715 has 16 divisors (see below), whose sum is σ = 162321408. Its totient is φ = 105419776.

The previous prime is 133515703. The next prime is 133515719. The reversal of 133515715 is 517515331.

It is a cyclic number.

It is not a de Polignac number, because 133515715 - 2⁷ = 133515587 is a prime.

It is a super-2 number, since 2×133515715² = 35652892303922450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133515719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216087 + ... + 216703.

It is an arithmetic number, because the mean of its divisors is an integer number (10145088).

Almost surely, 2^133515715 is an apocalyptic number.

133515715 is a deficient number, since it is larger than the sum of its proper divisors (28805693).

133515715 is a wasteful number, since it uses less digits than its factorization.

133515715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118.

The product of its digits is 7875, while the sum is 31.

The square root of 133515715 is about 11554.9000428390. The cubic root of 133515715 is about 511.1057834546.

The spelling of 133515715 in words is "one hundred thirty-three million, five hundred fifteen thousand, seven hundred fifteen".