102221572 has 6 divisors (see below), whose sum is σ = 178887758. Its totient is φ = 51110784.

The previous prime is 102221533. The next prime is 102221579. The reversal of 102221572 is 275122201.

It can be written as a sum of positive squares in only one way, i.e., 65060356 + 37161216 = 8066^2 + 6096^2 .

It is not an unprimeable number, because it can be changed into a prime (102221579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777693 + ... + 12777700.

Almost surely, 2^102221572 is an apocalyptic number.

It is an amenable number.

102221572 is a deficient number, since it is larger than the sum of its proper divisors (76666186).

102221572 is a wasteful number, since it uses less digits than its factorization.

102221572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25555397 (or 25555395 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 102221572 is about 10110.4684362298. The cubic root of 102221572 is about 467.5709475098.

Adding to 102221572 its reverse (275122201), we get a palindrome (377343773).

The spelling of 102221572 in words is "one hundred two million, two hundred twenty-one thousand, five hundred seventy-two".