131555494 has 12 divisors (see below), whose sum is σ = 229551084. Its totient is φ = 56380884.

The previous prime is 131555477. The next prime is 131555509. The reversal of 131555494 is 494555131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 671104 + ... + 671299.

It is an arithmetic number, because the mean of its divisors is an integer number (19129257).

Almost surely, 2^131555494 is an apocalyptic number.

131555494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

131555494 is a deficient number, since it is larger than the sum of its proper divisors (97995590).

131555494 is a wasteful number, since it uses less digits than its factorization.

131555494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342419 (or 1342412 counting only the distinct ones).

The product of its digits is 54000, while the sum is 37.

The square root of 131555494 is about 11469.7643393402. The cubic root of 131555494 is about 508.5921623992.

The spelling of 131555494 in words is "one hundred thirty-one million, five hundred fifty-five thousand, four hundred ninety-four".