545214521 has 4 divisors (see below), whose sum is σ = 545533044. Its totient is φ = 544896000.

The previous prime is 545214511. The next prime is 545214547. The reversal of 545214521 is 125412545.

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

It can be written as a sum of positive squares in 2 ways, for example, as 188760121 + 356454400 = 13739^2 + 18880^2 .

It is a cyclic number.

It is not a de Polignac number, because 545214521 - 2¹⁰ = 545213497 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545214511) 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, 156680 + ... + 160121.

It is an arithmetic number, because the mean of its divisors is an integer number (136383261).

Almost surely, 2^545214521 is an apocalyptic number.

It is an amenable number.

545214521 is a deficient number, since it is larger than the sum of its proper divisors (318523).

545214521 is a wasteful number, since it uses less digits than its factorization.

545214521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318522.

The product of its digits is 8000, while the sum is 29.

The square root of 545214521 is about 23349.8291428439. The cubic root of 545214521 is about 816.9380756844.

The spelling of 545214521 in words is "five hundred forty-five million, two hundred fourteen thousand, five hundred twenty-one".