25251220203 has 8 divisors (see below), whose sum is σ = 36729047616. Its totient is φ = 15303769800.

The previous prime is 25251220121. The next prime is 25251220217. The reversal of 25251220203 is 30202215252.

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

It is not a de Polignac number, because 25251220203 - 2⁸ = 25251219947 is a prime.

It is a super-2 number, since 2×25251220203² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25251220103) 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, 382594213 + ... + 382594278.

It is an arithmetic number, because the mean of its divisors is an integer number (4591130952).

Almost surely, 2^25251220203 is an apocalyptic number.

25251220203 is a deficient number, since it is larger than the sum of its proper divisors (11477827413).

25251220203 is a wasteful number, since it uses less digits than its factorization.

25251220203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765188505.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 25251220203 its reverse (30202215252), we get a palindrome (55453435455).

The spelling of 25251220203 in words is "twenty-five billion, two hundred fifty-one million, two hundred twenty thousand, two hundred three".