102221451 has 6 divisors (see below), whose sum is σ = 147653220. Its totient is φ = 68147628.

The previous prime is 102221447. The next prime is 102221467. The reversal of 102221451 is 154122201.

It is not a de Polignac number, because 102221451 - 2² = 102221447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102221401) 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, 5678961 + ... + 5678978.

It is an arithmetic number, because the mean of its divisors is an integer number (24608870).

Almost surely, 2^102221451 is an apocalyptic number.

102221451 is a deficient number, since it is larger than the sum of its proper divisors (45431769).

102221451 is a wasteful number, since it uses less digits than its factorization.

102221451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11357945 (or 11357942 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 102221451 is about 10110.4624523312. The cubic root of 102221451 is about 467.5707630214.

Adding to 102221451 its reverse (154122201), we get a palindrome (256343652).

The spelling of 102221451 in words is "one hundred two million, two hundred twenty-one thousand, four hundred fifty-one".