1215522343 has 16 divisors (see below), whose sum is σ = 1428074496. Its totient is φ = 1013100480.

The previous prime is 1215522337. The next prime is 1215522349. The reversal of 1215522343 is 3432255121.

It is an interprime number because it is at equal distance from previous prime (1215522337) and next prime (1215522349).

It is not a de Polignac number, because 1215522343 - 2⁵ = 1215522311 is a prime.

It is a super-5 number, since 5×1215522343⁵ (a number of 47 digits) contains 55555 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 (1215522349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19530 + ... + 53032.

It is an arithmetic number, because the mean of its divisors is an integer number (89254656).

Almost surely, 2^1215522343 is an apocalyptic number.

1215522343 is a deficient number, since it is larger than the sum of its proper divisors (212552153).

1215522343 is an equidigital number, since it uses as much as digits as its factorization.

1215522343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33654.

The product of its digits is 7200, while the sum is 28.

The square root of 1215522343 is about 34864.3419986668. The cubic root of 1215522343 is about 1067.2208845269.

Adding to 1215522343 its reverse (3432255121), we get a palindrome (4647777464).

The spelling of 1215522343 in words is "one billion, two hundred fifteen million, five hundred twenty-two thousand, three hundred forty-three".