25210052421 has 8 divisors (see below), whose sum is σ = 33615188544. Its totient is φ = 16805808960.

The previous prime is 25210052419. The next prime is 25210052429. The reversal of 25210052421 is 12425001252.

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

It is not a de Polignac number, because 25210052421 - 2¹ = 25210052419 is a prime.

It is a super-2 number, since 2×25210052421² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25210052391 and 25210052400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25210052429) 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, 154225 + ... + 272406.

It is an arithmetic number, because the mean of its divisors is an integer number (4201898568).

Almost surely, 2^25210052421 is an apocalyptic number.

It is an amenable number.

25210052421 is a deficient number, since it is larger than the sum of its proper divisors (8405136123).

25210052421 is a wasteful number, since it uses less digits than its factorization.

25210052421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446331.

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 25210052421 its reverse (12425001252), we get a palindrome (37635053673).

The spelling of 25210052421 in words is "twenty-five billion, two hundred ten million, fifty-two thousand, four hundred twenty-one".