2521206442 has 8 divisors (see below), whose sum is σ = 3786617376. Its totient is φ = 1259000652.

The previous prime is 2521206431. The next prime is 2521206461. The reversal of 2521206442 is 2446021252.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2521206442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799318 + ... + 802465.

It is an arithmetic number, because the mean of its divisors is an integer number (473327172).

Almost surely, 2^2521206442 is an apocalyptic number.

2521206442 is a deficient number, since it is larger than the sum of its proper divisors (1265410934).

2521206442 is a wasteful number, since it uses less digits than its factorization.

2521206442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602572.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 2521206442 is about 50211.6166041286. The cubic root of 2521206442 is about 1361.0355510446.

Adding to 2521206442 its reverse (2446021252), we get a palindrome (4967227694).

The spelling of 2521206442 in words is "two billion, five hundred twenty-one million, two hundred six thousand, four hundred forty-two".