2151017505 has 128 divisors (see below), whose sum is σ = 4730019840. Its totient is φ = 903156480.

The previous prime is 2151017483. The next prime is 2151017507. The reversal of 2151017505 is 5057101512.

2151017505 is a `hidden beast` number, since 2 + 151 + 0 + 1 + 7 + 505 = 666.

It is not a de Polignac number, because 2151017505 - 2¹⁸ = 2150755361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2151017507) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3820354 + ... + 3820916.

It is an arithmetic number, because the mean of its divisors is an integer number (36953280).

Almost surely, 2^2151017505 is an apocalyptic number.

It is an amenable number.

2151017505 is an abundant number, since it is smaller than the sum of its proper divisors (2579002335).

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

2151017505 is a wasteful number, since it uses less digits than its factorization.

2151017505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

The square root of 2151017505 is about 46379.0632182238. The cubic root of 2151017505 is about 1290.8664541344.

The spelling of 2151017505 in words is "two billion, one hundred fifty-one million, seventeen thousand, five hundred five".