131225069 has 4 divisors (see below), whose sum is σ = 131279100. Its totient is φ = 131171040.

The previous prime is 131225063. The next prime is 131225113. The reversal of 131225069 is 960522131.

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 79887844 + 51337225 = 8938^2 + 7165^2 .

It is a cyclic number.

It is not a de Polignac number, because 131225069 - 2⁴ = 131225053 is a prime.

It is a super-2 number, since 2×131225069² = 34440037468109522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131225063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23192 + ... + 28289.

It is an arithmetic number, because the mean of its divisors is an integer number (32819775).

Almost surely, 2^131225069 is an apocalyptic number.

It is an amenable number.

131225069 is a deficient number, since it is larger than the sum of its proper divisors (54031).

131225069 is an equidigital number, since it uses as much as digits as its factorization.

131225069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54030.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 131225069 is about 11455.3511076702. The cubic root of 131225069 is about 508.1659988745.

The spelling of 131225069 in words is "one hundred thirty-one million, two hundred twenty-five thousand, sixty-nine".