131533870 has 16 divisors (see below), whose sum is σ = 254973600. Its totient is φ = 48566304.

The previous prime is 131533823. The next prime is 131533877. The reversal of 131533870 is 78335131.

131533870 = 2555² + 2556² + ... + 2574².

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131533877) 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, 505770 + ... + 506029.

It is an arithmetic number, because the mean of its divisors is an integer number (15935850).

Almost surely, 2^131533870 is an apocalyptic number.

131533870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131533870 is a deficient number, since it is larger than the sum of its proper divisors (123439730).

131533870 is a wasteful number, since it uses less digits than its factorization.

131533870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011819.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 131533870 is about 11468.8216482776. The cubic root of 131533870 is about 508.5642948197.

The spelling of 131533870 in words is "one hundred thirty-one million, five hundred thirty-three thousand, eight hundred seventy".