53775819 has 20 divisors (see below), whose sum is σ = 80844456. Its totient is φ = 35621856.

The previous prime is 53775809. The next prime is 53775829. The reversal of 53775819 is 91857735.

It is an interprime number because it is at equal distance from previous prime (53775809) and next prime (53775829).

It is not a de Polignac number, because 53775819 - 2⁴ = 53775803 is a prime.

It is a super-2 number, since 2×53775819² = 5783677418241522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53775809) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11167 + ... + 15239.

Almost surely, 2^53775819 is an apocalyptic number.

53775819 is a deficient number, since it is larger than the sum of its proper divisors (27068637).

53775819 is a wasteful number, since it uses less digits than its factorization.

53775819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248 (or 4239 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 53775819 is about 7333.1997790869. The cubic root of 53775819 is about 377.4525332479.

The spelling of 53775819 in words is "fifty-three million, seven hundred seventy-five thousand, eight hundred nineteen".