215161005 has 32 divisors (see below), whose sum is σ = 357154560. Its totient is φ = 110476800.

The previous prime is 215160941. The next prime is 215161013. The reversal of 215161005 is 500161512.

215161005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215161005 - 2⁶ = 215160941 is a prime.

It is a super-2 number, since 2×215161005² = 92588516145220050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261024 + ... + 261846.

It is an arithmetic number, because the mean of its divisors is an integer number (11161080).

Almost surely, 2^215161005 is an apocalyptic number.

It is an amenable number.

215161005 is a deficient number, since it is larger than the sum of its proper divisors (141993555).

215161005 is a wasteful number, since it uses less digits than its factorization.

215161005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 215161005 is about 14668.3674960781. The cubic root of 215161005 is about 599.2221447823. Note that the first 3 decimals are identical.

The spelling of 215161005 in words is "two hundred fifteen million, one hundred sixty-one thousand, five".