102531481 has 4 divisors (see below), whose sum is σ = 110418532. Its totient is φ = 94644432.

The previous prime is 102531469. The next prime is 102531491. The reversal of 102531481 is 184135201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12110400 + 90421081 = 3480^2 + 9509^2 .

It is a cyclic number.

It is not a de Polignac number, because 102531481 - 2⁵ = 102531449 is a prime.

It is a super-2 number, since 2×102531481² = 21025409192106722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102531461) by changing a digit.

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, 3943506 + ... + 3943531.

It is an arithmetic number, because the mean of its divisors is an integer number (27604633).

Almost surely, 2^102531481 is an apocalyptic number.

It is an amenable number.

102531481 is a deficient number, since it is larger than the sum of its proper divisors (7887051).

102531481 is an equidigital number, since it uses as much as digits as its factorization.

102531481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7887050.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 102531481 is about 10125.7829820711. The cubic root of 102531481 is about 468.0429882956.

Adding to 102531481 its reverse (184135201), we get a palindrome (286666682).

The spelling of 102531481 in words is "one hundred two million, five hundred thirty-one thousand, four hundred eighty-one".