53145761 has 4 divisors (see below), whose sum is σ = 53184432. Its totient is φ = 53107092.

The previous prime is 53145751. The next prime is 53145839. The reversal of 53145761 is 16754135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16754135 = 5 ⋅3350827.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53145761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53145731) 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, 17195 + ... + 20048.

It is an arithmetic number, because the mean of its divisors is an integer number (13296108).

Almost surely, 2^53145761 is an apocalyptic number.

It is an amenable number.

53145761 is a deficient number, since it is larger than the sum of its proper divisors (38671).

53145761 is a wasteful number, since it uses less digits than its factorization.

53145761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38670.

The product of its digits is 12600, while the sum is 32.

The square root of 53145761 is about 7290.1139222923. The cubic root of 53145761 is about 375.9726124046.

Adding to 53145761 its reverse (16754135), we get a palindrome (69899896).

The spelling of 53145761 in words is "fifty-three million, one hundred forty-five thousand, seven hundred sixty-one".