101156172 has 24 divisors (see below), whose sum is σ = 254187696. Its totient is φ = 31124928.

The previous prime is 101156129. The next prime is 101156177. The reversal of 101156172 is 271651101.

It is a super-2 number, since 2×101156172² = 20465142267387168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (101156177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324063 + ... + 324374.

It is an arithmetic number, because the mean of its divisors is an integer number (10591154).

Almost surely, 2^101156172 is an apocalyptic number.

101156172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101156172 is an abundant number, since it is smaller than the sum of its proper divisors (153031524).

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

101156172 is a wasteful number, since it uses less digits than its factorization.

101156172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648457 (or 648455 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 101156172 is about 10057.6424672982. The cubic root of 101156172 is about 465.9408583543.

The spelling of 101156172 in words is "one hundred one million, one hundred fifty-six thousand, one hundred seventy-two".