248922166421 has 6 divisors (see below), whose sum is σ = 252112971222. Its totient is φ = 245771246760.

The previous prime is 248922166373. The next prime is 248922166457. The reversal of 248922166421 is 124661229842.

It can be written as a sum of positive squares in only one way, i.e., 185373302500 + 63548863921 = 430550^2 + 252089^2 .

It is not a de Polignac number, because 248922166421 - 2³⁰ = 247848424597 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 (248922166481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19936250 + ... + 19948731.

It is an arithmetic number, because the mean of its divisors is an integer number (42018828537).

Almost surely, 2^248922166421 is an apocalyptic number.

It is an amenable number.

248922166421 is a deficient number, since it is larger than the sum of its proper divisors (3190804801).

248922166421 is an frugal number, since it uses more digits than its factorization.

248922166421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39885139 (or 39885060 counting only the distinct ones).

The product of its digits is 663552, while the sum is 47.

The spelling of 248922166421 in words is "two hundred forty-eight billion, nine hundred twenty-two million, one hundred sixty-six thousand, four hundred twenty-one".