525543421 has 8 divisors (see below), whose sum is σ = 566332704. Its totient is φ = 484806000.

The previous prime is 525543419. The next prime is 525543427. The reversal of 525543421 is 124345525.

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

It is a cyclic number.

It is not a de Polignac number, because 525543421 - 2¹ = 525543419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525543427) 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, 9546 + ... + 33796.

It is an arithmetic number, because the mean of its divisors is an integer number (70791588).

Almost surely, 2^525543421 is an apocalyptic number.

It is an amenable number.

525543421 is a deficient number, since it is larger than the sum of its proper divisors (40789283).

525543421 is a wasteful number, since it uses less digits than its factorization.

525543421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25931.

The product of its digits is 24000, while the sum is 31.

The square root of 525543421 is about 22924.7338261538. The cubic root of 525543421 is about 806.9925670346.

Adding to 525543421 its reverse (124345525), we get a palindrome (649888946).

The spelling of 525543421 in words is "five hundred twenty-five million, five hundred forty-three thousand, four hundred twenty-one".