491223854 has 16 divisors (see below), whose sum is σ = 804349440. Its totient is φ = 223136760.

The previous prime is 491223847. The next prime is 491223893. The reversal of 491223854 is 458322194.

It is a super-2 number, since 2×491223854² = 482601749477226632, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31427 + ... + 44385.

It is an arithmetic number, because the mean of its divisors is an integer number (50271840).

Almost surely, 2^491223854 is an apocalyptic number.

491223854 is a deficient number, since it is larger than the sum of its proper divisors (313125586).

491223854 is a wasteful number, since it uses less digits than its factorization.

491223854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14695.

The product of its digits is 69120, while the sum is 38.

The square root of 491223854 is about 22163.5704253624. The cubic root of 491223854 is about 789.0293339305.

The spelling of 491223854 in words is "four hundred ninety-one million, two hundred twenty-three thousand, eight hundred fifty-four".