155971101 has 16 divisors (see below), whose sum is σ = 244319040. Its totient is φ = 87256320.

The previous prime is 155971097. The next prime is 155971111. The reversal of 155971101 is 101179551.

It is not a de Polignac number, because 155971101 - 2² = 155971097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155971111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181356 + ... + 182213.

It is an arithmetic number, because the mean of its divisors is an integer number (15269940).

Almost surely, 2^155971101 is an apocalyptic number.

155971101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155971101 is a deficient number, since it is larger than the sum of its proper divisors (88347939).

155971101 is a wasteful number, since it uses less digits than its factorization.

155971101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363596.

The product of its (nonzero) digits is 1575, while the sum is 30.

The square root of 155971101 is about 12488.8390573344. The cubic root of 155971101 is about 538.2880178180.

The spelling of 155971101 in words is "one hundred fifty-five million, nine hundred seventy-one thousand, one hundred one".