102523231 has 4 divisors (see below), whose sum is σ = 105830464. Its totient is φ = 99216000.

The previous prime is 102523229. The next prime is 102523241. The reversal of 102523231 is 132325201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102523231 - 2¹ = 102523229 is a prime.

It is a super-2 number, since 2×102523231² = 21022025789358722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102523199 and 102523208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102523241) 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, 1653570 + ... + 1653631.

It is an arithmetic number, because the mean of its divisors is an integer number (26457616).

Almost surely, 2^102523231 is an apocalyptic number.

102523231 is a deficient number, since it is larger than the sum of its proper divisors (3307233).

102523231 is an equidigital number, since it uses as much as digits as its factorization.

102523231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307232.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 102523231 is about 10125.3755979717. The cubic root of 102523231 is about 468.0304345635.

Adding to 102523231 its reverse (132325201), we get a palindrome (234848432).

The spelling of 102523231 in words is "one hundred two million, five hundred twenty-three thousand, two hundred thirty-one".