129932550 has 72 divisors (see below), whose sum is σ = 380835000. Its totient is φ = 31497600.

The previous prime is 129932533. The next prime is 129932591. The reversal of 129932550 is 55239921.

It is a happy number.

129932550 is a `hidden beast` number, since 12 + 9 + 93 + 2 + 550 = 666.

It is a super-3 number, since 3×129932550³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8175 + ... + 18074.

It is an arithmetic number, because the mean of its divisors is an integer number (5289375).

Almost surely, 2^129932550 is an apocalyptic number.

129932550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129932550 is an abundant number, since it is smaller than the sum of its proper divisors (250902450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129932550 is a wasteful number, since it uses less digits than its factorization.

129932550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26278 (or 26270 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 129932550 is about 11398.7959890508. The cubic root of 129932550 is about 506.4920744433.

The spelling of 129932550 in words is "one hundred twenty-nine million, nine hundred thirty-two thousand, five hundred fifty".