2281552421 has 2 divisors, whose sum is σ = 2281552422. Its totient is φ = 2281552420.

The previous prime is 2281552397. The next prime is 2281552447. The reversal of 2281552421 is 1242551822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1777549921 + 504002500 = 42161^2 + 22450^2 .

It is a cyclic number.

It is not a de Polignac number, because 2281552421 - 2²² = 2277358117 is a prime.

It is a super-2 number, since 2×2281552421² = 10410962899541922482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2281552451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1140776210 + 1140776211.

It is an arithmetic number, because the mean of its divisors is an integer number (1140776211).

Almost surely, 2^2281552421 is an apocalyptic number.

It is an amenable number.

2281552421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2281552421 is an equidigital number, since it uses as much as digits as its factorization.

2281552421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12800, while the sum is 32.

The square root of 2281552421 is about 47765.5987191619. The cubic root of 2281552421 is about 1316.4675257725.

It can be divided in two parts, 228155 and 2421, that multiplied together give a palindrome (552363255).

The spelling of 2281552421 in words is "two billion, two hundred eighty-one million, five hundred fifty-two thousand, four hundred twenty-one".