2191505270 has 8 divisors (see below), whose sum is σ = 3944709504. Its totient is φ = 876602104.

The previous prime is 2191505233. The next prime is 2191505273. The reversal of 2191505270 is 725051912.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191505273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109575254 + ... + 109575273.

It is an arithmetic number, because the mean of its divisors is an integer number (493088688).

Almost surely, 2^2191505270 is an apocalyptic number.

2191505270 is a deficient number, since it is larger than the sum of its proper divisors (1753204234).

2191505270 is a wasteful number, since it uses less digits than its factorization.

2191505270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219150534.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 2191505270 is about 46813.5158901786. The cubic root of 2191505270 is about 1298.9153220560.

The spelling of 2191505270 in words is "two billion, one hundred ninety-one million, five hundred five thousand, two hundred seventy".