1215001423530 has 48 divisors (see below), whose sum is σ = 3180205103400. Its totient is φ = 321825876864.

The previous prime is 1215001423523. The next prime is 1215001423543. The reversal of 1215001423530 is 353241005121.

1215001423530 is a `hidden beast` number, since 12 + 1 + 500 + 142 + 3 + 5 + 3 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 843875565129 + 371125858401 = 918627^2 + 609201^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1215001423494 and 1215001423503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45288657 + ... + 45315476.

Almost surely, 2^{1215001423530} is an apocalyptic number.

1215001423530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215001423530 is an abundant number, since it is smaller than the sum of its proper divisors (1965203679870).

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

1215001423530 is a wasteful number, since it uses less digits than its factorization.

1215001423530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90604295 (or 90604292 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 1215001423530 its reverse (353241005121), we get a palindrome (1568242428651).

The spelling of 1215001423530 in words is "one trillion, two hundred fifteen billion, one million, four hundred twenty-three thousand, five hundred thirty".