131423215 has 64 divisors (see below), whose sum is σ = 207360000. Its totient is φ = 77575680.

The previous prime is 131423213. The next prime is 131423221. The reversal of 131423215 is 512324131.

It is a happy number.

It is not a de Polignac number, because 131423215 - 2¹ = 131423213 is a prime.

It is a super-2 number, since 2×131423215² = 34544122881872450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131423213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 881961 + ... + 882109.

It is an arithmetic number, because the mean of its divisors is an integer number (3240000).

Almost surely, 2^131423215 is an apocalyptic number.

131423215 is a deficient number, since it is larger than the sum of its proper divisors (75936785).

131423215 is a wasteful number, since it uses less digits than its factorization.

131423215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280.

The product of its digits is 720, while the sum is 22.

The square root of 131423215 is about 11463.9964672011. The cubic root of 131423215 is about 508.4216421574.

Adding to 131423215 its reverse (512324131), we get a palindrome (643747346).

The spelling of 131423215 in words is "one hundred thirty-one million, four hundred twenty-three thousand, two hundred fifteen".