25532333421 has 12 divisors (see below), whose sum is σ = 39601170432. Its totient is φ = 14589904728.

The previous prime is 25532333413. The next prime is 25532333441. The reversal of 25532333421 is 12433323552.

It is not a de Polignac number, because 25532333421 - 2³ = 25532333413 is a prime.

It is a super-2 number, since 2×25532333421² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25532333441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86844525 + ... + 86844818.

It is an arithmetic number, because the mean of its divisors is an integer number (3300097536).

Almost surely, 2^25532333421 is an apocalyptic number.

25532333421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25532333421 is a deficient number, since it is larger than the sum of its proper divisors (14068837011).

25532333421 is a wasteful number, since it uses less digits than its factorization.

25532333421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173689360 (or 173689353 counting only the distinct ones).

The product of its digits is 64800, while the sum is 33.

Adding to 25532333421 its reverse (12433323552), we get a palindrome (37965656973).

The spelling of 25532333421 in words is "twenty-five billion, five hundred thirty-two million, three hundred thirty-three thousand, four hundred twenty-one".