15414340421 has 4 divisors (see below), whose sum is σ = 15439988844. Its totient is φ = 15388692000.

The previous prime is 15414340379. The next prime is 15414340429. The reversal of 15414340421 is 12404341451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13870950625 + 1543389796 = 117775^2 + 39286^2 .

It is a cyclic number.

It is not a de Polignac number, because 15414340421 - 2¹⁰ = 15414339397 is a prime.

It is a super-2 number, since 2×15414340421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15414340429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12823310 + ... + 12824511.

It is an arithmetic number, because the mean of its divisors is an integer number (3859997211).

Almost surely, 2^15414340421 is an apocalyptic number.

It is an amenable number.

15414340421 is a deficient number, since it is larger than the sum of its proper divisors (25648423).

15414340421 is an equidigital number, since it uses as much as digits as its factorization.

15414340421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25648422.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 15414340421 its reverse (12404341451), we get a palindrome (27818681872).

The spelling of 15414340421 in words is "fifteen billion, four hundred fourteen million, three hundred forty thousand, four hundred twenty-one".