102618431 has 4 divisors (see below), whose sum is σ = 102689664. Its totient is φ = 102547200.

The previous prime is 102618421. The next prime is 102618469. The reversal of 102618431 is 134816201.

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

It is a cyclic number.

It is not a de Polignac number, because 102618431 - 2¹⁴ = 102602047 is a prime.

It is a super-2 number, since 2×102618431² = 21061084761803522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102618431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102618421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33410 + ... + 36351.

It is an arithmetic number, because the mean of its divisors is an integer number (25672416).

Almost surely, 2^102618431 is an apocalyptic number.

102618431 is a deficient number, since it is larger than the sum of its proper divisors (71233).

102618431 is an equidigital number, since it uses as much as digits as its factorization.

102618431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71232.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 102618431 is about 10130.0755673391. The cubic root of 102618431 is about 468.1752560925.

The spelling of 102618431 in words is "one hundred two million, six hundred eighteen thousand, four hundred thirty-one".