495851281 has 4 divisors (see below), whose sum is σ = 504255600. Its totient is φ = 487446964.

The previous prime is 495851267. The next prime is 495851287. The reversal of 495851281 is 182158594.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-495851281 is a prime.

It is a super-5 number, since 5×495851281⁵ (a number of 45 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (495851287) 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, 4202071 + ... + 4202188.

It is an arithmetic number, because the mean of its divisors is an integer number (126063900).

Almost surely, 2^495851281 is an apocalyptic number.

It is an amenable number.

495851281 is a deficient number, since it is larger than the sum of its proper divisors (8404319).

495851281 is an equidigital number, since it uses as much as digits as its factorization.

495851281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8404318.

The product of its digits is 115200, while the sum is 43.

The square root of 495851281 is about 22267.7183608918. The cubic root of 495851281 is about 791.4991992854.

The spelling of 495851281 in words is "four hundred ninety-five million, eight hundred fifty-one thousand, two hundred eighty-one".