2148402281 has 4 divisors (see below), whose sum is σ = 2148528000. Its totient is φ = 2148276564.

The previous prime is 2148402259. The next prime is 2148402301. The reversal of 2148402281 is 1822048412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2148402281 is a prime.

It is a super-2 number, since 2×2148402281² = 9231264722012005922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2148402241) 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, 32261 + ... + 73058.

It is an arithmetic number, because the mean of its divisors is an integer number (537132000).

Almost surely, 2^2148402281 is an apocalyptic number.

It is an amenable number.

2148402281 is a deficient number, since it is larger than the sum of its proper divisors (125719).

2148402281 is a wasteful number, since it uses less digits than its factorization.

2148402281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125718.

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 2148402281 is about 46350.8606284716. The cubic root of 2148402281 is about 1290.3430934459.

The spelling of 2148402281 in words is "two billion, one hundred forty-eight million, four hundred two thousand, two hundred eighty-one".