1215152204531 has 8 divisors (see below), whose sum is σ = 1286692301664. Its totient is φ = 1143618835840.

The previous prime is 1215152204521. The next prime is 1215152204569. The reversal of 1215152204531 is 1354022515121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215152204531 is a prime.

It is a super-2 number, since 2×1215152204531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215152204521) 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, 1307900 + ... + 2034921.

It is an arithmetic number, because the mean of its divisors is an integer number (160836537708).

Almost surely, 2^{1215152204531} is an apocalyptic number.

1215152204531 is a deficient number, since it is larger than the sum of its proper divisors (71540097133).

1215152204531 is a wasteful number, since it uses less digits than its factorization.

1215152204531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364221.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 1215152204531 its reverse (1354022515121), we get a palindrome (2569174719652).

The spelling of 1215152204531 in words is "one trillion, two hundred fifteen billion, one hundred fifty-two million, two hundred four thousand, five hundred thirty-one".