53440051 has 4 divisors (see below), whose sum is σ = 61074352. Its totient is φ = 45805752.

The previous prime is 53440031. The next prime is 53440091. The reversal of 53440051 is 15004435.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15004435 = 5 ⋅3000887.

It is a cyclic number.

It is not a de Polignac number, because 53440051 - 2⁵ = 53440019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53440031) 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, 3817140 + ... + 3817153.

It is an arithmetic number, because the mean of its divisors is an integer number (15268588).

Almost surely, 2^53440051 is an apocalyptic number.

53440051 is a deficient number, since it is larger than the sum of its proper divisors (7634301).

53440051 is an equidigital number, since it uses as much as digits as its factorization.

53440051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7634300.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 53440051 is about 7310.2702412428. The cubic root of 53440051 is about 376.6653072061.

Adding to 53440051 its reverse (15004435), we get a palindrome (68444486).

The spelling of 53440051 in words is "fifty-three million, four hundred forty thousand, fifty-one".