131440534 has 8 divisors (see below), whose sum is σ = 197272008. Its totient is φ = 65683200.

The previous prime is 131440531. The next prime is 131440541. The reversal of 131440534 is 435044131.

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

It is a super-2 number, since 2×131440534² = 34553227956410312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131440499 and 131440508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131440531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13867 + ... + 21334.

It is an arithmetic number, because the mean of its divisors is an integer number (24659001).

Almost surely, 2^131440534 is an apocalyptic number.

131440534 is a deficient number, since it is larger than the sum of its proper divisors (65831474).

131440534 is a wasteful number, since it uses less digits than its factorization.

131440534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37070.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 131440534 is about 11464.7518071697. The cubic root of 131440534 is about 508.4439745073.

Adding to 131440534 its reverse (435044131), we get a palindrome (566484665).

The spelling of 131440534 in words is "one hundred thirty-one million, four hundred forty thousand, five hundred thirty-four".