1215525133 has 8 divisors (see below), whose sum is σ = 1279836000. Its totient is φ = 1151247888.

The previous prime is 1215525131. The next prime is 1215525173. The reversal of 1215525133 is 3315255121.

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

It is a cyclic number.

It is not a de Polignac number, because 1215525133 - 2¹ = 1215525131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215525131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105543 + ... + 116491.

It is an arithmetic number, because the mean of its divisors is an integer number (159979500).

Almost surely, 2^1215525133 is an apocalyptic number.

It is an amenable number.

1215525133 is a deficient number, since it is larger than the sum of its proper divisors (64310867).

1215525133 is a wasteful number, since it uses less digits than its factorization.

1215525133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16811.

The product of its digits is 4500, while the sum is 28.

The square root of 1215525133 is about 34864.3820108718. The cubic root of 1215525133 is about 1067.2217010604.

The spelling of 1215525133 in words is "one billion, two hundred fifteen million, five hundred twenty-five thousand, one hundred thirty-three".