15423054421 has 2 divisors, whose sum is σ = 15423054422. Its totient is φ = 15423054420.

The previous prime is 15423054403. The next prime is 15423054463. The reversal of 15423054421 is 12445032451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9724918225 + 5698136196 = 98615^2 + 75486^2 .

It is a cyclic number.

It is not a de Polignac number, because 15423054421 - 2⁷ = 15423054293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15423054401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7711527210 + 7711527211.

It is an arithmetic number, because the mean of its divisors is an integer number (7711527211).

Almost surely, 2^15423054421 is an apocalyptic number.

It is an amenable number.

15423054421 is a deficient number, since it is larger than the sum of its proper divisors (1).

15423054421 is an equidigital number, since it uses as much as digits as its factorization.

15423054421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 15423054421 its reverse (12445032451), we get a palindrome (27868086872).

The spelling of 15423054421 in words is "fifteen billion, four hundred twenty-three million, fifty-four thousand, four hundred twenty-one".