15340252220421 has 16 divisors (see below), whose sum is σ = 21011895313920. Its totient is φ = 9949135201280.

The previous prime is 15340252220399. The next prime is 15340252220443. The reversal of 15340252220421 is 12402225204351.

15340252220421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (15340252220399) and next prime (15340252220443).

It is a cyclic number.

It is not a de Polignac number, because 15340252220421 - 2¹⁴ = 15340252204037 is a prime.

It is a super-2 number, since 2×15340252220421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15340252225421) 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, 176610261 + ... + 176697098.

It is an arithmetic number, because the mean of its divisors is an integer number (1313243457120).

Almost surely, 2^{15340252220421} is an apocalyptic number.

It is an amenable number.

15340252220421 is a deficient number, since it is larger than the sum of its proper divisors (5671643093499).

15340252220421 is a wasteful number, since it uses less digits than its factorization.

15340252220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353307756.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 15340252220421 its reverse (12402225204351), we get a palindrome (27742477424772).

The spelling of 15340252220421 in words is "fifteen trillion, three hundred forty billion, two hundred fifty-two million, two hundred twenty thousand, four hundred twenty-one".