15448692542221 has 2 divisors, whose sum is σ = 15448692542222. Its totient is φ = 15448692542220.

The previous prime is 15448692542183. The next prime is 15448692542293. The reversal of 15448692542221 is 12224529684451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12709303430121 + 2739389112100 = 3565011^2 + 1655110^2 .

It is a cyclic number.

It is not a de Polignac number, because 15448692542221 - 2¹¹ = 15448692540173 is a prime.

It is a super-2 number, since 2×15448692542221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15448692042221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7724346271110 + 7724346271111.

It is an arithmetic number, because the mean of its divisors is an integer number (7724346271111).

Almost surely, 2^{15448692542221} is an apocalyptic number.

It is an amenable number.

15448692542221 is a deficient number, since it is larger than the sum of its proper divisors (1).

15448692542221 is an equidigital number, since it uses as much as digits as its factorization.

15448692542221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11059200, while the sum is 55.

The spelling of 15448692542221 in words is "fifteen trillion, four hundred forty-eight billion, six hundred ninety-two million, five hundred forty-two thousand, two hundred twenty-one".