102211408 has 30 divisors (see below), whose sum is σ = 213572702. Its totient is φ = 47107200.

The previous prime is 102211397. The next prime is 102211409. The reversal of 102211408 is 804112201.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 32855824 + 69355584 = 5732^2 + 8328^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102211409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 145458 + ... + 146158.

Almost surely, 2^102211408 is an apocalyptic number.

It is an amenable number.

102211408 is an abundant number, since it is smaller than the sum of its proper divisors (111361294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102211408 is an frugal number, since it uses more digits than its factorization.

102211408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 102211408 is about 10109.9657764010. The cubic root of 102211408 is about 467.5554499701. Note that the first 3 decimals are identical.

Adding to 102211408 its reverse (804112201), we get a palindrome (906323609).

The spelling of 102211408 in words is "one hundred two million, two hundred eleven thousand, four hundred eight".