2521542366 has 64 divisors (see below), whose sum is σ = 6467420160. Its totient is φ = 713296800.

The previous prime is 2521542343. The next prime is 2521542389. The reversal of 2521542366 is 6632451252.

2521542366 is a `hidden beast` number, since 2 + 52 + 1 + 542 + 3 + 66 = 666.

It is an interprime number because it is at equal distance from previous prime (2521542343) and next prime (2521542389).

It is a self number, because there is not a number n which added to its sum of digits gives 2521542366.

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 5155 + ... + 71201.

It is an arithmetic number, because the mean of its divisors is an integer number (101053440).

Almost surely, 2^2521542366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2521542366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3233710080).

2521542366 is an abundant number, since it is smaller than the sum of its proper divisors (3945877794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2521542366 is a wasteful number, since it uses less digits than its factorization.

2521542366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66166 (or 66160 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 2521542366 is about 50214.9615752118. The cubic root of 2521542366 is about 1361.0959962075.

The spelling of 2521542366 in words is "two billion, five hundred twenty-one million, five hundred forty-two thousand, three hundred sixty-six".