130821171 has 48 divisors (see below), whose sum is σ = 208476576. Its totient is φ = 72281088.

The previous prime is 130821161. The next prime is 130821193. The reversal of 130821171 is 171128031.

It is a happy number.

It is not a de Polignac number, because 130821171 - 2⁶ = 130821107 is a prime.

It is a super-2 number, since 2×130821171² = 34228357563622482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (130821151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 350541 + ... + 350913.

It is an arithmetic number, because the mean of its divisors is an integer number (4343262).

Almost surely, 2^130821171 is an apocalyptic number.

130821171 is a deficient number, since it is larger than the sum of its proper divisors (77655405).

130821171 is a wasteful number, since it uses less digits than its factorization.

130821171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 24.

The square root of 130821171 is about 11437.7082931853. The cubic root of 130821171 is about 507.6441012168.

The spelling of 130821171 in words is "one hundred thirty million, eight hundred twenty-one thousand, one hundred seventy-one".