2521216542 has 32 divisors (see below), whose sum is σ = 5435464608. Its totient is φ = 775022976.

The previous prime is 2521216541. The next prime is 2521216547. The reversal of 2521216542 is 2456121252.

2521216542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521216541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70468 + ... + 100040.

It is an arithmetic number, because the mean of its divisors is an integer number (169858269).

Almost surely, 2^2521216542 is an apocalyptic number.

2521216542 is an abundant number, since it is smaller than the sum of its proper divisors (2914248066).

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

2521216542 is a wasteful number, since it uses less digits than its factorization.

2521216542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30684.

The product of its digits is 9600, while the sum is 30.

The square root of 2521216542 is about 50211.7171783639. The cubic root of 2521216542 is about 1361.0373684868.

Adding to 2521216542 its reverse (2456121252), we get a palindrome (4977337794).

The spelling of 2521216542 in words is "two billion, five hundred twenty-one million, two hundred sixteen thousand, five hundred forty-two".