2501258821 has 8 divisors (see below), whose sum is σ = 2512275584. Its totient is φ = 2490264000.

The previous prime is 2501258813. The next prime is 2501258843. The reversal of 2501258821 is 1288521052.

It is a happy number.

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 2501258821 - 2³ = 2501258813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2501258801) 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, 248146 + ... + 258028.

It is an arithmetic number, because the mean of its divisors is an integer number (314034448).

Almost surely, 2^2501258821 is an apocalyptic number.

It is an amenable number.

2501258821 is a deficient number, since it is larger than the sum of its proper divisors (11016763).

2501258821 is an equidigital number, since it uses as much as digits as its factorization.

2501258821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10971.

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 2501258821 is about 50012.5866257685. The cubic root of 2501258821 is about 1357.4365678005.

Adding to 2501258821 its reverse (1288521052), we get a palindrome (3789779873).

The spelling of 2501258821 in words is "two billion, five hundred one million, two hundred fifty-eight thousand, eight hundred twenty-one".