102220397 has 4 divisors (see below), whose sum is σ = 102847680. Its totient is φ = 101593116.

The previous prime is 102220379. The next prime is 102220403. The reversal of 102220397 is 793022201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 793022201 = 251 ⋅3159451.

It is a cyclic number.

It is not a de Polignac number, because 102220397 - 2¹⁴ = 102204013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313397 + ... + 313722.

It is an arithmetic number, because the mean of its divisors is an integer number (25711920).

Almost surely, 2^102220397 is an apocalyptic number.

It is an amenable number.

102220397 is a deficient number, since it is larger than the sum of its proper divisors (627283).

102220397 is an equidigital number, since it uses as much as digits as its factorization.

102220397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627282.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 102220397 is about 10110.4103279738. The cubic root of 102220397 is about 467.5691559833.

Adding to 102220397 its reverse (793022201), we get a palindrome (895242598).

The spelling of 102220397 in words is "one hundred two million, two hundred twenty thousand, three hundred ninety-seven".