103531261 has 4 divisors (see below), whose sum is σ = 103717692. Its totient is φ = 103344832.

The previous prime is 103531223. The next prime is 103531283. The reversal of 103531261 is 162135301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162135301 = 31 ⋅5230171.

It can be written as a sum of positive squares in 2 ways, for example, as 36602500 + 66928761 = 6050^2 + 8181^2 .

It is a cyclic number.

It is not a de Polignac number, because 103531261 - 2²³ = 95142653 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 (103531201) 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, 92380 + ... + 93493.

It is an arithmetic number, because the mean of its divisors is an integer number (25929423).

Almost surely, 2^103531261 is an apocalyptic number.

It is an amenable number.

103531261 is a deficient number, since it is larger than the sum of its proper divisors (186431).

103531261 is an equidigital number, since it uses as much as digits as its factorization.

103531261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186430.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 103531261 is about 10175.0312530233. The cubic root of 103531261 is about 469.5593591577.

Adding to 103531261 its reverse (162135301), we get a palindrome (265666562).

The spelling of 103531261 in words is "one hundred three million, five hundred thirty-one thousand, two hundred sixty-one".