131631215 has 8 divisors (see below), whose sum is σ = 160315440. Its totient is φ = 103732992.

The previous prime is 131631173. The next prime is 131631217. The reversal of 131631215 is 512136131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131631215 - 2¹⁴ = 131614831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131631217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196130 + ... + 196799.

It is an arithmetic number, because the mean of its divisors is an integer number (20039430).

Almost surely, 2^131631215 is an apocalyptic number.

131631215 is a deficient number, since it is larger than the sum of its proper divisors (28684225).

131631215 is an equidigital number, since it uses as much as digits as its factorization.

131631215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393001.

The product of its digits is 540, while the sum is 23.

The square root of 131631215 is about 11473.0647605598. The cubic root of 131631215 is about 508.6897225480.

Adding to 131631215 its reverse (512136131), we get a palindrome (643767346).

The spelling of 131631215 in words is "one hundred thirty-one million, six hundred thirty-one thousand, two hundred fifteen".