513640454 has 4 divisors (see below), whose sum is σ = 770460684. Its totient is φ = 256820226.

The previous prime is 513640453. The next prime is 513640459. The reversal of 513640454 is 454046315.

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

It is a super-2 number, since 2×513640454² = 527653031970652232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 513640454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513640453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128410112 + ... + 128410115.

It is an arithmetic number, because the mean of its divisors is an integer number (192615171).

Almost surely, 2^513640454 is an apocalyptic number.

513640454 is a deficient number, since it is larger than the sum of its proper divisors (256820230).

513640454 is a wasteful number, since it uses less digits than its factorization.

513640454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256820229.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 513640454 is about 22663.6372632462. The cubic root of 513640454 is about 800.8534922399.

Adding to 513640454 its reverse (454046315), we get a palindrome (967686769).

The spelling of 513640454 in words is "five hundred thirteen million, six hundred forty thousand, four hundred fifty-four".