545555531 has 4 divisors (see below), whose sum is σ = 574269000. Its totient is φ = 516842064.

The previous prime is 545555519. The next prime is 545555533. The reversal of 545555531 is 135555545.

It is a happy number.

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 545555531 - 2⁶ = 545555467 is a prime.

It is a super-2 number, since 2×545555531² = 595261674809383922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545555533) 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, 14356706 + ... + 14356743.

It is an arithmetic number, because the mean of its divisors is an integer number (143567250).

Almost surely, 2^545555531 is an apocalyptic number.

545555531 is a deficient number, since it is larger than the sum of its proper divisors (28713469).

545555531 is a wasteful number, since it uses less digits than its factorization.

545555531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28713468.

The product of its digits is 187500, while the sum is 38.

The square root of 545555531 is about 23357.1301961521. The cubic root of 545555531 is about 817.1083609462.

The spelling of 545555531 in words is "five hundred forty-five million, five hundred fifty-five thousand, five hundred thirty-one".