421053625523 has 4 divisors (see below), whose sum is σ = 421326506928. Its totient is φ = 420780744120.

The previous prime is 421053625507. The next prime is 421053625549. The reversal of 421053625523 is 325526350124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421053625523 - 2⁴ = 421053625507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421053825523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136438388 + ... + 136441473.

It is an arithmetic number, because the mean of its divisors is an integer number (105331626732).

Almost surely, 2^421053625523 is an apocalyptic number.

421053625523 is a deficient number, since it is larger than the sum of its proper divisors (272881405).

421053625523 is a wasteful number, since it uses less digits than its factorization.

421053625523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272881404.

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 421053625523 its reverse (325526350124), we get a palindrome (746579975647).

The spelling of 421053625523 in words is "four hundred twenty-one billion, fifty-three million, six hundred twenty-five thousand, five hundred twenty-three".