2478543521 has 32 divisors (see below), whose sum is σ = 2781905280. Its totient is φ = 2199052800.

The previous prime is 2478543499. The next prime is 2478543541. The reversal of 2478543521 is 1253458742.

2478543521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2478543521 - 2²² = 2474349217 is a prime.

It is a super-2 number, since 2×2478543521² = 12286355970982154882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2478543541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2042711 + ... + 2043923.

It is an arithmetic number, because the mean of its divisors is an integer number (86934540).

Almost surely, 2^2478543521 is an apocalyptic number.

It is an amenable number.

2478543521 is a deficient number, since it is larger than the sum of its proper divisors (303361759).

2478543521 is a wasteful number, since it uses less digits than its factorization.

2478543521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377.

The product of its digits is 268800, while the sum is 41.

The square root of 2478543521 is about 49784.9728432185. The cubic root of 2478543521 is about 1353.3148572560.

The spelling of 2478543521 in words is "two billion, four hundred seventy-eight million, five hundred forty-three thousand, five hundred twenty-one".