1215514440105 has 48 divisors (see below), whose sum is σ = 2268647533440. Its totient is φ = 554115813888.

The previous prime is 1215514440097. The next prime is 1215514440139. The reversal of 1215514440105 is 5010444155121.

It is not a de Polignac number, because 1215514440105 - 2³ = 1215514440097 is a prime.

It is a super-2 number, since 2×1215514440105² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2039424 + ... + 2567153.

It is an arithmetic number, because the mean of its divisors is an integer number (47263490280).

Almost surely, 2^{1215514440105} is an apocalyptic number.

1215514440105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215514440105 is a deficient number, since it is larger than the sum of its proper divisors (1053133093335).

1215514440105 is a wasteful number, since it uses less digits than its factorization.

1215514440105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606958 (or 4606951 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 33.

Adding to 1215514440105 its reverse (5010444155121), we get a palindrome (6225958595226).

The spelling of 1215514440105 in words is "one trillion, two hundred fifteen billion, five hundred fourteen million, four hundred forty thousand, one hundred five".