101581167 has 4 divisors (see below), whose sum is σ = 135441560. Its totient is φ = 67720776.

The previous prime is 101581159. The next prime is 101581177. The reversal of 101581167 is 761185101.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 101581167 - 2³ = 101581159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101581177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16930192 + ... + 16930197.

It is an arithmetic number, because the mean of its divisors is an integer number (33860390).

Almost surely, 2^101581167 is an apocalyptic number.

101581167 is a deficient number, since it is larger than the sum of its proper divisors (33860393).

101581167 is an equidigital number, since it uses as much as digits as its factorization.

101581167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33860392.

The product of its (nonzero) digits is 1680, while the sum is 30.

The square root of 101581167 is about 10078.7482853775. The cubic root of 101581167 is about 466.5924773786.

It can be divided in two parts, 10158 and 1167, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 101581167 in words is "one hundred one million, five hundred eighty-one thousand, one hundred sixty-seven".