201615621171 has 8 divisors (see below), whose sum is σ = 278090512080. Its totient is φ = 129775572192.

The previous prime is 201615621143. The next prime is 201615621197. The reversal of 201615621171 is 171126516102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201615621171 - 2²¹ = 201613524019 is a prime.

It is a super-2 number, since 2×201615621171² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201615623171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1158710380 + ... + 1158710553.

It is an arithmetic number, because the mean of its divisors is an integer number (34761314010).

Almost surely, 2^201615621171 is an apocalyptic number.

201615621171 is a deficient number, since it is larger than the sum of its proper divisors (76474890909).

201615621171 is a wasteful number, since it uses less digits than its factorization.

201615621171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317420965.

The product of its (nonzero) digits is 5040, while the sum is 33.

The spelling of 201615621171 in words is "two hundred one billion, six hundred fifteen million, six hundred twenty-one thousand, one hundred seventy-one".