102640513 has 8 divisors (see below), whose sum is σ = 108460800. Its totient is φ = 96933408.

The previous prime is 102640493. The next prime is 102640523. The reversal of 102640513 is 315046201.

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

It is not a de Polignac number, because 102640513 - 2⁵ = 102640481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102640523) 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, 26428 + ... + 30061.

It is an arithmetic number, because the mean of its divisors is an integer number (13557600).

Almost surely, 2^102640513 is an apocalyptic number.

It is an amenable number.

102640513 is a deficient number, since it is larger than the sum of its proper divisors (5820287).

102640513 is an equidigital number, since it uses as much as digits as its factorization.

102640513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56591.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 102640513 is about 10131.1654314792. The cubic root of 102640513 is about 468.2088351953.

Adding to 102640513 its reverse (315046201), we get a palindrome (417686714).

The spelling of 102640513 in words is "one hundred two million, six hundred forty thousand, five hundred thirteen".