1215502540530 has 16 divisors (see below), whose sum is σ = 2917206097344. Its totient is φ = 324134010800.

The previous prime is 1215502540459. The next prime is 1215502540583. The reversal of 1215502540530 is 350452055121.

It is a junction number, because it is equal to n+sod(n) for n = 1215502540491 and 1215502540500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20258375646 + ... + 20258375705.

It is an arithmetic number, because the mean of its divisors is an integer number (182325381084).

Almost surely, 2^{1215502540530} is an apocalyptic number.

1215502540530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215502540530 is an abundant number, since it is smaller than the sum of its proper divisors (1701703556814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215502540530 is a wasteful number, since it uses less digits than its factorization.

1215502540530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40516751361.

The product of its (nonzero) digits is 30000, while the sum is 33.

Adding to 1215502540530 its reverse (350452055121), we get a palindrome (1565954595651).

The spelling of 1215502540530 in words is "one trillion, two hundred fifteen billion, five hundred two million, five hundred forty thousand, five hundred thirty".