523642454 has 4 divisors (see below), whose sum is σ = 785463684. Its totient is φ = 261821226.

The previous prime is 523642423. The next prime is 523642459. The reversal of 523642454 is 454246325.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×523642454² = 548402839262284232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523642459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130910612 + ... + 130910615.

It is an arithmetic number, because the mean of its divisors is an integer number (196365921).

Almost surely, 2^523642454 is an apocalyptic number.

523642454 is a deficient number, since it is larger than the sum of its proper divisors (261821230).

523642454 is a wasteful number, since it uses less digits than its factorization.

523642454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261821229.

The product of its digits is 115200, while the sum is 35.

The square root of 523642454 is about 22883.2352170754. The cubic root of 523642454 is about 806.0183883397.

Adding to 523642454 its reverse (454246325), we get a palindrome (977888779).

The spelling of 523642454 in words is "five hundred twenty-three million, six hundred forty-two thousand, four hundred fifty-four".