25000252621 has 8 divisors (see below), whose sum is σ = 25029785088. Its totient is φ = 24970740000.

The previous prime is 25000252601. The next prime is 25000252631. The reversal of 25000252621 is 12625200052.

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 a de Polignac number, because none of the positive numbers 2^k-25000252621 is a prime.

It is a super-2 number, since 2×25000252621² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25000252601) 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, 4917801 + ... + 4922881.

It is an arithmetic number, because the mean of its divisors is an integer number (3128723136).

Almost surely, 2^25000252621 is an apocalyptic number.

It is an amenable number.

25000252621 is a deficient number, since it is larger than the sum of its proper divisors (29532467).

25000252621 is a wasteful number, since it uses less digits than its factorization.

25000252621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9923.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 25000252621 its reverse (12625200052), we get a palindrome (37625452673).

The spelling of 25000252621 in words is "twenty-five billion, two hundred fifty-two thousand, six hundred twenty-one".