491052451 has 4 divisors (see below), whose sum is σ = 491097600. Its totient is φ = 491007304.

The previous prime is 491052433. The next prime is 491052469. The reversal of 491052451 is 154250194.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (491052433) and next prime (491052469).

It is a cyclic number.

It is not a de Polignac number, because 491052451 - 2¹¹ = 491050403 is a prime.

It is a super-2 number, since 2×491052451² = 482265019266214802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491052421) 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, 4830 + ... + 31708.

It is an arithmetic number, because the mean of its divisors is an integer number (122774400).

Almost surely, 2^491052451 is an apocalyptic number.

491052451 is a deficient number, since it is larger than the sum of its proper divisors (45149).

491052451 is a wasteful number, since it uses less digits than its factorization.

491052451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45148.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 491052451 is about 22159.7033148009. The cubic root of 491052451 is about 788.9375511130.

The spelling of 491052451 in words is "four hundred ninety-one million, fifty-two thousand, four hundred fifty-one".