25013431221 has 8 divisors (see below), whose sum is σ = 33725975040. Its totient is φ = 16488254112.

The previous prime is 25013431171. The next prime is 25013431259. The reversal of 25013431221 is 12213431052.

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

It is not a de Polignac number, because 25013431221 - 2¹⁴ = 25013414837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25013431191 and 25013431200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25013431291) 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, 46841365 + ... + 46841898.

It is an arithmetic number, because the mean of its divisors is an integer number (4215746880).

Almost surely, 2^25013431221 is an apocalyptic number.

It is an amenable number.

25013431221 is a deficient number, since it is larger than the sum of its proper divisors (8712543819).

25013431221 is an equidigital number, since it uses as much as digits as its factorization.

25013431221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93683355.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 25013431221 its reverse (12213431052), we get a palindrome (37226862273).

The spelling of 25013431221 in words is "twenty-five billion, thirteen million, four hundred thirty-one thousand, two hundred twenty-one".