53191519 has 4 divisors (see below), whose sum is σ = 53688744. Its totient is φ = 52694296.

The previous prime is 53191499. The next prime is 53191531. The reversal of 53191519 is 91519135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91519135 = 5 ⋅18303827.

It is a cyclic number.

It is not a de Polignac number, because 53191519 - 2⁹ = 53191007 is a prime.

It is a super-2 number, since 2×53191519² = 5658675387054722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53191219) 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, 248452 + ... + 248665.

It is an arithmetic number, because the mean of its divisors is an integer number (13422186).

Almost surely, 2^53191519 is an apocalyptic number.

53191519 is a deficient number, since it is larger than the sum of its proper divisors (497225).

53191519 is a wasteful number, since it uses less digits than its factorization.

53191519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497224.

The product of its digits is 6075, while the sum is 34.

The square root of 53191519 is about 7293.2516067938. The cubic root of 53191519 is about 376.0804844118.

The spelling of 53191519 in words is "fifty-three million, one hundred ninety-one thousand, five hundred nineteen".