131887665530 has 64 divisors (see below), whose sum is σ = 245308095648. Its totient is φ = 51020759040.

The previous prime is 131887665517. The next prime is 131887665551. The reversal of 131887665530 is 35566788131.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 42906565321 + 88981100209 = 207139^2 + 298297^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58022474 + ... + 58024746.

Almost surely, 2^131887665530 is an apocalyptic number.

131887665530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131887665530 is a deficient number, since it is larger than the sum of its proper divisors (113420430118).

131887665530 is a wasteful number, since it uses less digits than its factorization.

131887665530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491.

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 131887665530 in words is "one hundred thirty-one billion, eight hundred eighty-seven million, six hundred sixty-five thousand, five hundred thirty".