131226215 has 4 divisors (see below), whose sum is σ = 157471464. Its totient is φ = 104980968.

The previous prime is 131226197. The next prime is 131226233. The reversal of 131226215 is 512622131.

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

It is an interprime number because it is at equal distance from previous prime (131226197) and next prime (131226233).

It is a cyclic number.

It is not a de Polignac number, because 131226215 - 2⁸ = 131225959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13122617 + ... + 13122626.

It is an arithmetic number, because the mean of its divisors is an integer number (39367866).

Almost surely, 2^131226215 is an apocalyptic number.

131226215 is a deficient number, since it is larger than the sum of its proper divisors (26245249).

131226215 is an equidigital number, since it uses as much as digits as its factorization.

131226215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26245248.

The product of its digits is 720, while the sum is 23.

The square root of 131226215 is about 11455.4011278523. The cubic root of 131226215 is about 508.1674781562.

Adding to 131226215 its reverse (512622131), we get a palindrome (643848346).

The spelling of 131226215 in words is "one hundred thirty-one million, two hundred twenty-six thousand, two hundred fifteen".