2278530421 has 2 divisors, whose sum is σ = 2278530422. Its totient is φ = 2278530420.

The previous prime is 2278530409. The next prime is 2278530461. The reversal of 2278530421 is 1240358722.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1508467921 + 770062500 = 38839^2 + 27750^2 .

It is a cyclic number.

It is not a de Polignac number, because 2278530421 - 2¹³ = 2278522229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2278530461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139265210 + 1139265211.

It is an arithmetic number, because the mean of its divisors is an integer number (1139265211).

Almost surely, 2^2278530421 is an apocalyptic number.

It is an amenable number.

2278530421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2278530421 is an equidigital number, since it uses as much as digits as its factorization.

2278530421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 2278530421 is about 47733.9545920930. The cubic root of 2278530421 is about 1315.8860324266.

The spelling of 2278530421 in words is "two billion, two hundred seventy-eight million, five hundred thirty thousand, four hundred twenty-one".