131226015 has 16 divisors (see below), whose sum is σ = 217202400. Its totient is φ = 67573632.

The previous prime is 131225993. The next prime is 131226019. The reversal of 131226015 is 510622131.

It is not a de Polignac number, because 131226015 - 2¹⁶ = 131160479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131225982 and 131226000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131226019) 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 15 ways as a sum of consecutive naturals, for example, 150400 + ... + 151269.

It is an arithmetic number, because the mean of its divisors is an integer number (13575150).

Almost surely, 2^131226015 is an apocalyptic number.

131226015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131226015 is a deficient number, since it is larger than the sum of its proper divisors (85976385).

131226015 is a wasteful number, since it uses less digits than its factorization.

131226015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301706.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 131226015 is about 11455.3923983424. The cubic root of 131226015 is about 508.1672199925.

Adding to 131226015 its reverse (510622131), we get a palindrome (641848146).

The spelling of 131226015 in words is "one hundred thirty-one million, two hundred twenty-six thousand, fifteen".