102440631 has 8 divisors (see below), whose sum is σ = 137184880. Its totient is φ = 67995072.

The previous prime is 102440617. The next prime is 102440641. The reversal of 102440631 is 136044201.

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

It is not a de Polignac number, because 102440631 - 2⁵ = 102440599 is a prime.

It is a super-2 number, since 2×102440631² = 20988165759356322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102440598 and 102440607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102440641) 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, 73870 + ... + 75243.

It is an arithmetic number, because the mean of its divisors is an integer number (17148110).

Almost surely, 2^102440631 is an apocalyptic number.

102440631 is a deficient number, since it is larger than the sum of its proper divisors (34744249).

102440631 is a wasteful number, since it uses less digits than its factorization.

102440631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149345.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 102440631 is about 10121.2959150496. The cubic root of 102440631 is about 467.9047079342.

Adding to 102440631 its reverse (136044201), we get a palindrome (238484832).

The spelling of 102440631 in words is "one hundred two million, four hundred forty thousand, six hundred thirty-one".