102431636 has 6 divisors (see below), whose sum is σ = 179255370. Its totient is φ = 51215816.

The previous prime is 102431597. The next prime is 102431639. The reversal of 102431636 is 636134201.

It can be written as a sum of positive squares in only one way, i.e., 93006736 + 9424900 = 9644^2 + 3070^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102431639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12803951 + ... + 12803958.

It is an arithmetic number, because the mean of its divisors is an integer number (29875895).

Almost surely, 2^102431636 is an apocalyptic number.

It is an amenable number.

102431636 is a deficient number, since it is larger than the sum of its proper divisors (76823734).

102431636 is a wasteful number, since it uses less digits than its factorization.

102431636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25607913 (or 25607911 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 102431636 is about 10120.8515452011. The cubic root of 102431636 is about 467.8910124373.

Adding to 102431636 its reverse (636134201), we get a palindrome (738565837).

The spelling of 102431636 in words is "one hundred two million, four hundred thirty-one thousand, six hundred thirty-six".