131820356 has 12 divisors (see below), whose sum is σ = 234129168. Its totient is φ = 64926312.

The previous prime is 131820343. The next prime is 131820361. The reversal of 131820356 is 653028131.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245666 + ... + 246201.

It is an arithmetic number, because the mean of its divisors is an integer number (19510764).

Almost surely, 2^131820356 is an apocalyptic number.

It is an amenable number.

131820356 is a deficient number, since it is larger than the sum of its proper divisors (102308812).

131820356 is a wasteful number, since it uses less digits than its factorization.

131820356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491938 (or 491936 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 131820356 is about 11481.3046297013. The cubic root of 131820356 is about 508.9332515017.

Adding to 131820356 its reverse (653028131), we get a palindrome (784848487).

The spelling of 131820356 in words is "one hundred thirty-one million, eight hundred twenty thousand, three hundred fifty-six".