53290191 has 4 divisors (see below), whose sum is σ = 71053592. Its totient is φ = 35526792.

The previous prime is 53290183. The next prime is 53290207. The reversal of 53290191 is 19109235.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 53290191 - 2³ = 53290183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53290141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8881696 + ... + 8881701.

It is an arithmetic number, because the mean of its divisors is an integer number (17763398).

Almost surely, 2^53290191 is an apocalyptic number.

53290191 is a deficient number, since it is larger than the sum of its proper divisors (17763401).

53290191 is a wasteful number, since it uses less digits than its factorization.

53290191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17763400.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 53290191 is about 7300.0130821801. The cubic root of 53290191 is about 376.3128879476.

The spelling of 53290191 in words is "fifty-three million, two hundred ninety thousand, one hundred ninety-one".