1215054231 has 8 divisors (see below), whose sum is σ = 1622642304. Its totient is φ = 808751160.

The previous prime is 1215054221. The next prime is 1215054257. The reversal of 1215054231 is 1324505121.

It is a happy number.

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

It is not a de Polignac number, because 1215054231 - 2⁶ = 1215054167 is a prime.

It is a super-2 number, since 2×1215054231² = 2952713568542002722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215054221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319041 + ... + 322826.

It is an arithmetic number, because the mean of its divisors is an integer number (202830288).

Almost surely, 2^1215054231 is an apocalyptic number.

1215054231 is a deficient number, since it is larger than the sum of its proper divisors (407588073).

1215054231 is an equidigital number, since it uses as much as digits as its factorization.

1215054231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642501.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1215054231 is about 34857.6280174082. The cubic root of 1215054231 is about 1067.0838671504.

Adding to 1215054231 its reverse (1324505121), we get a palindrome (2539559352).

The spelling of 1215054231 in words is "one billion, two hundred fifteen million, fifty-four thousand, two hundred thirty-one".