1215512232031 has 8 divisors (see below), whose sum is σ = 1263031728128. Its totient is φ = 1168512075000.

The previous prime is 1215512232029. The next prime is 1215512232043. The reversal of 1215512232031 is 1302322155121.

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 1215512232031 - 2¹ = 1215512232029 is a prime.

It is a super-2 number, since 2×1215512232031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215512235031) 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, 129829995 + ... + 129839356.

It is an arithmetic number, because the mean of its divisors is an integer number (157878966016).

Almost surely, 2^{1215512232031} is an apocalyptic number.

1215512232031 is a deficient number, since it is larger than the sum of its proper divisors (47519496097).

1215512232031 is a wasteful number, since it uses less digits than its factorization.

1215512232031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259669533.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 1215512232031 its reverse (1302322155121), we get a palindrome (2517834387152).

The spelling of 1215512232031 in words is "one trillion, two hundred fifteen billion, five hundred twelve million, two hundred thirty-two thousand, thirty-one".