15454774230421 has 4 divisors (see below), whose sum is σ = 15454790250732. Its totient is φ = 15454758210112.

The previous prime is 15454774230239. The next prime is 15454774230461. The reversal of 15454774230421 is 12403247745451.

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 8611114180900 + 6843660049521 = 2934470^2 + 2616039^2 .

It is a cyclic number.

It is not a de Polignac number, because 15454774230421 - 2¹⁹ = 15454773706133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15454774230461) 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, 6463570 + ... + 8525683.

It is an arithmetic number, because the mean of its divisors is an integer number (3863697562683).

Almost surely, 2^{15454774230421} is an apocalyptic number.

It is an amenable number.

15454774230421 is a deficient number, since it is larger than the sum of its proper divisors (16020311).

15454774230421 is a wasteful number, since it uses less digits than its factorization.

15454774230421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16020310.

The product of its (nonzero) digits is 3763200, while the sum is 49.

The spelling of 15454774230421 in words is "fifteen trillion, four hundred fifty-four billion, seven hundred seventy-four million, two hundred thirty thousand, four hundred twenty-one".