513640551 has 8 divisors (see below), whose sum is σ = 685563264. Its totient is φ = 342072440.

The previous prime is 513640529. The next prime is 513640571. The reversal of 513640551 is 155046315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 513640551 - 2²² = 509446247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513640571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85251 + ... + 91076.

It is an arithmetic number, because the mean of its divisors is an integer number (85695408).

Almost surely, 2^513640551 is an apocalyptic number.

513640551 is a deficient number, since it is larger than the sum of its proper divisors (171922713).

513640551 is a wasteful number, since it uses less digits than its factorization.

513640551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177301.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 513640551 is about 22663.6394032380. The cubic root of 513640551 is about 800.8535426531.

Adding to 513640551 its reverse (155046315), we get a palindrome (668686866).

The spelling of 513640551 in words is "five hundred thirteen million, six hundred forty thousand, five hundred fifty-one".