545521431 has 32 divisors (see below), whose sum is σ = 898067968. Its totient is φ = 286830720.

The previous prime is 545521411. The next prime is 545521469. The reversal of 545521431 is 134125545.

It is not a de Polignac number, because 545521431 - 2¹⁰ = 545520407 is a prime.

It is a super-2 number, since 2×545521431² = 595187263360575522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545521411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87345 + ... + 93381.

It is an arithmetic number, because the mean of its divisors is an integer number (28064624).

Almost surely, 2^545521431 is an apocalyptic number.

545521431 is a deficient number, since it is larger than the sum of its proper divisors (352546537).

545521431 is a wasteful number, since it uses less digits than its factorization.

545521431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6391.

The product of its digits is 12000, while the sum is 30.

The square root of 545521431 is about 23356.4002149304. The cubic root of 545521431 is about 817.0913361131.

Adding to 545521431 its reverse (134125545), we get a palindrome (679646976).

The spelling of 545521431 in words is "five hundred forty-five million, five hundred twenty-one thousand, four hundred thirty-one".