131403522 has 16 divisors (see below), whose sum is σ = 264549312. Its totient is φ = 43510800.

The previous prime is 131403509. The next prime is 131403527. The reversal of 131403522 is 225304131.

It is not an unprimeable number, because it can be changed into a prime (131403527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71613 + ... + 73424.

It is an arithmetic number, because the mean of its divisors is an integer number (16534332).

Almost surely, 2^131403522 is an apocalyptic number.

131403522 is an abundant number, since it is smaller than the sum of its proper divisors (133145790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131403522 is a wasteful number, since it uses less digits than its factorization.

131403522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145193.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 131403522 is about 11463.1375286175. The cubic root of 131403522 is about 508.3962462192.

Adding to 131403522 its reverse (225304131), we get a palindrome (356707653).

The spelling of 131403522 in words is "one hundred thirty-one million, four hundred three thousand, five hundred twenty-two".