15412021451 has 4 divisors (see below), whose sum is σ = 15439013304. Its totient is φ = 15385029600.

The previous prime is 15412021433. The next prime is 15412021453.

It is a happy number.

15412021451 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 15412021451 - 2¹⁰ = 15412020427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15412021451.

It is not an unprimeable number, because it can be changed into a prime (15412021453) 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, 13495070 + ... + 13496211.

It is an arithmetic number, because the mean of its divisors is an integer number (3859753326).

Almost surely, 2^15412021451 is an apocalyptic number.

15412021451 is a deficient number, since it is larger than the sum of its proper divisors (26991853).

15412021451 is an equidigital number, since it uses as much as digits as its factorization.

15412021451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26991852.

The product of its (nonzero) digits is 1600, while the sum is 26.

It can be divided in two parts, 154120 and 21451, that added together give a palindrome (175571).

The spelling of 15412021451 in words is "fifteen billion, four hundred twelve million, twenty-one thousand, four hundred fifty-one".