102203545 has 4 divisors (see below), whose sum is σ = 122644260. Its totient is φ = 81762832.

The previous prime is 102203539. The next prime is 102203551. The reversal of 102203545 is 545302201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545302201 = 1601 ⋅340601.

It is an interprime number because it is at equal distance from previous prime (102203539) and next prime (102203551).

It can be written as a sum of positive squares in 2 ways, for example, as 35748441 + 66455104 = 5979^2 + 8152^2 .

It is a cyclic number.

It is not a de Polignac number, because 102203545 - 2³ = 102203537 is a prime.

It is a super-2 number, since 2×102203545² = 20891129221134050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10220350 + ... + 10220359.

It is an arithmetic number, because the mean of its divisors is an integer number (30661065).

Almost surely, 2^102203545 is an apocalyptic number.

It is an amenable number.

102203545 is a deficient number, since it is larger than the sum of its proper divisors (20440715).

102203545 is an equidigital number, since it uses as much as digits as its factorization.

102203545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20440714.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 102203545 is about 10109.5768952019. The cubic root of 102203545 is about 467.5434601708.

Adding to 102203545 its reverse (545302201), we get a palindrome (647505746).

The spelling of 102203545 in words is "one hundred two million, two hundred three thousand, five hundred forty-five".