1215231541 has 8 divisors (see below), whose sum is σ = 1246368384. Its totient is φ = 1184398800.

The previous prime is 1215231491. The next prime is 1215231551. The reversal of 1215231541 is 1451325121.

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 1215231541 - 2¹⁵ = 1215198773 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 (1215231551) 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, 67921 + ... + 83926.

It is an arithmetic number, because the mean of its divisors is an integer number (155796048).

Almost surely, 2^1215231541 is an apocalyptic number.

It is an amenable number.

1215231541 is a deficient number, since it is larger than the sum of its proper divisors (31136843).

1215231541 is a wasteful number, since it uses less digits than its factorization.

1215231541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152051.

The product of its digits is 1200, while the sum is 25.

The square root of 1215231541 is about 34860.1712703767. The cubic root of 1215231541 is about 1067.1357703036.

Adding to 1215231541 its reverse (1451325121), we get a palindrome (2666556662).

The spelling of 1215231541 in words is "one billion, two hundred fifteen million, two hundred thirty-one thousand, five hundred forty-one".