102220025 has 6 divisors (see below), whose sum is σ = 126752862. Its totient is φ = 81776000.

The previous prime is 102220007. The next prime is 102220039. The reversal of 102220025 is 520022201.

It can be written as a sum of positive squares in 3 ways, for example, as 1478656 + 100741369 = 1216^2 + 10037^2 .

It is not a de Polignac number, because 102220025 - 2⁶ = 102219961 is a prime.

It is a super-2 number, since 2×102220025² = 20897867022001250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102219991 and 102220009.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2044376 + ... + 2044425.

It is an arithmetic number, because the mean of its divisors is an integer number (21125477).

Almost surely, 2^102220025 is an apocalyptic number.

It is an amenable number.

102220025 is a deficient number, since it is larger than the sum of its proper divisors (24532837).

102220025 is an equidigital number, since it uses as much as digits as its factorization.

102220025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088811 (or 4088806 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 102220025 is about 10110.3919310776. The cubic root of 102220025 is about 467.5685887908.

Adding to 102220025 its reverse (520022201), we get a palindrome (622242226).

The spelling of 102220025 in words is "one hundred two million, two hundred twenty thousand, twenty-five".