213151505 has 16 divisors (see below), whose sum is σ = 301753344. Its totient is φ = 141445440.

The previous prime is 213151501. The next prime is 213151513. The reversal of 213151505 is 505151312.

It is a happy number.

213151505 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 213151505 - 2² = 213151501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213151501) 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, 97142 + ... + 99311.

It is an arithmetic number, because the mean of its divisors is an integer number (18859584).

Almost surely, 2^213151505 is an apocalyptic number.

It is an amenable number.

213151505 is a deficient number, since it is larger than the sum of its proper divisors (88601839).

213151505 is a wasteful number, since it uses less digits than its factorization.

213151505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196496.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 213151505 is about 14599.7090724439. The cubic root of 213151505 is about 597.3508249641.

The spelling of 213151505 in words is "two hundred thirteen million, one hundred fifty-one thousand, five hundred five".