523355421 has 16 divisors (see below), whose sum is σ = 747762624. Its totient is φ = 324420864.

The previous prime is 523355383. The next prime is 523355453. The reversal of 523355421 is 124553325.

It is not a de Polignac number, because 523355421 - 2¹¹ = 523353373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523355461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57586 + ... + 66051.

It is an arithmetic number, because the mean of its divisors is an integer number (46735164).

Almost surely, 2^523355421 is an apocalyptic number.

523355421 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

523355421 is a deficient number, since it is larger than the sum of its proper divisors (224407203).

523355421 is a wasteful number, since it uses less digits than its factorization.

523355421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123740.

The product of its digits is 18000, while the sum is 30.

The square root of 523355421 is about 22876.9626699000. The cubic root of 523355421 is about 805.8710892561.

It can be divided in two parts, 523355 and 421, that added together give a triangular number (523776 = T₁₀₂₃).

The spelling of 523355421 in words is "five hundred twenty-three million, three hundred fifty-five thousand, four hundred twenty-one".