2543562421 has 8 divisors (see below), whose sum is σ = 2658400920. Its totient is φ = 2430532608.

The previous prime is 2543562419. The next prime is 2543562451. The reversal of 2543562421 is 1242653452.

It can be written as a sum of positive squares in 4 ways, for example, as 474586225 + 2068976196 = 21785^2 + 45486^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2543562421 - 2¹ = 2543562419 is a prime.

It is a super-3 number, since 3×2543562421³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543562401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449296 + ... + 454921.

It is an arithmetic number, because the mean of its divisors is an integer number (332300115).

Almost surely, 2^2543562421 is an apocalyptic number.

It is an amenable number.

2543562421 is a deficient number, since it is larger than the sum of its proper divisors (114838499).

2543562421 is an equidigital number, since it uses as much as digits as its factorization.

2543562421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904343.

The product of its digits is 57600, while the sum is 34.

The square root of 2543562421 is about 50433.7428811307. The cubic root of 2543562421 is about 1365.0465656984.

The spelling of 2543562421 in words is "two billion, five hundred forty-three million, five hundred sixty-two thousand, four hundred twenty-one".