15242327421 has 16 divisors (see below), whose sum is σ = 21395505600. Its totient is φ = 9625488768.

The previous prime is 15242327407. The next prime is 15242327423. The reversal of 15242327421 is 12472324251.

It is a happy number.

It is not a de Polignac number, because 15242327421 - 2¹⁰ = 15242326397 is a prime.

It is a super-2 number, since 2×15242327421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15242327423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 654835 + ... + 677711.

It is an arithmetic number, because the mean of its divisors is an integer number (1337219100).

Almost surely, 2^15242327421 is an apocalyptic number.

It is an amenable number.

15242327421 is a deficient number, since it is larger than the sum of its proper divisors (6153178179).

15242327421 is a wasteful number, since it uses less digits than its factorization.

15242327421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34588.

The product of its digits is 26880, while the sum is 33.

The spelling of 15242327421 in words is "fifteen billion, two hundred forty-two million, three hundred twenty-seven thousand, four hundred twenty-one".