68455531 has 4 divisors (see below), whose sum is σ = 69393352. Its totient is φ = 67517712.

The previous prime is 68455529. The next prime is 68455559. The reversal of 68455531 is 13555486.

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 68455531 - 2¹ = 68455529 is a prime.

It is a super-2 number, since 2×68455531² = 9372319448983922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68455561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468801 + ... + 468946.

It is an arithmetic number, because the mean of its divisors is an integer number (17348338).

Almost surely, 2^68455531 is an apocalyptic number.

68455531 is a deficient number, since it is larger than the sum of its proper divisors (937821).

68455531 is an equidigital number, since it uses as much as digits as its factorization.

68455531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937820.

The product of its digits is 72000, while the sum is 37.

The square root of 68455531 is about 8273.7857719426. The cubic root of 68455531 is about 409.0749140937.

It can be divided in two parts, 68455 and 531, that added together give a palindrome (68986).

The spelling of 68455531 in words is "sixty-eight million, four hundred fifty-five thousand, five hundred thirty-one".