545312551 has 4 divisors (see below), whose sum is σ = 623214352. Its totient is φ = 467410752.

The previous prime is 545312539. The next prime is 545312557. The reversal of 545312551 is 155213545.

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 545312551 - 2⁹ = 545312039 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 (545312557) 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, 38950890 + ... + 38950903.

It is an arithmetic number, because the mean of its divisors is an integer number (155803588).

Almost surely, 2^545312551 is an apocalyptic number.

545312551 is a deficient number, since it is larger than the sum of its proper divisors (77901801).

545312551 is an equidigital number, since it uses as much as digits as its factorization.

545312551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77901800.

The product of its digits is 15000, while the sum is 31.

The square root of 545312551 is about 23351.9282073237. The cubic root of 545312551 is about 816.9870347866.

The spelling of 545312551 in words is "five hundred forty-five million, three hundred twelve thousand, five hundred fifty-one".