545132021 has 12 divisors (see below), whose sum is σ = 657526752. Its totient is φ = 442661544.

The previous prime is 545132017. The next prime is 545132041. The reversal of 545132021 is 120231545.

It is not a de Polignac number, because 545132021 - 2² = 545132017 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 (545132041) 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, 105335 + ... + 110388.

It is an arithmetic number, because the mean of its divisors is an integer number (54793896).

Almost surely, 2^545132021 is an apocalyptic number.

It is an amenable number.

545132021 is a deficient number, since it is larger than the sum of its proper divisors (112394731).

545132021 is a wasteful number, since it uses less digits than its factorization.

545132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215768 (or 215749 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 545132021 is about 23348.0624677938. The cubic root of 545132021 is about 816.8968681790.

Adding to 545132021 its reverse (120231545), we get a palindrome (665363566).

The spelling of 545132021 in words is "five hundred forty-five million, one hundred thirty-two thousand, twenty-one".