25323015421 has 8 divisors (see below), whose sum is σ = 27974793600. Its totient is φ = 22729518240.

The previous prime is 25323015373. The next prime is 25323015469. The reversal of 25323015421 is 12451032352.

It is an interprime number because it is at equal distance from previous prime (25323015373) and next prime (25323015469).

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

It is not a de Polignac number, because 25323015421 - 2⁹ = 25323014909 is a prime.

It is a super-2 number, since 2×25323015421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25323015421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25323010421) 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, 14569336 + ... + 14571073.

It is an arithmetic number, because the mean of its divisors is an integer number (3496849200).

Almost surely, 2^25323015421 is an apocalyptic number.

It is an amenable number.

25323015421 is a deficient number, since it is larger than the sum of its proper divisors (2651778179).

25323015421 is a wasteful number, since it uses less digits than its factorization.

25323015421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29140499.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 25323015421 its reverse (12451032352), we get a palindrome (37774047773).

The spelling of 25323015421 in words is "twenty-five billion, three hundred twenty-three million, fifteen thousand, four hundred twenty-one".