53312511 has 8 divisors (see below), whose sum is σ = 81238144. Its totient is φ = 30464280.

The previous prime is 53312507. The next prime is 53312543. The reversal of 53312511 is 11521335.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53312511 - 2² = 53312507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2538691 = 53312511 / (5 + 3 + 3 + 1 + 2 + 5 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53312911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1269325 + ... + 1269366.

It is an arithmetic number, because the mean of its divisors is an integer number (10154768).

Almost surely, 2^53312511 is an apocalyptic number.

53312511 is a deficient number, since it is larger than the sum of its proper divisors (27925633).

53312511 is a wasteful number, since it uses less digits than its factorization.

53312511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538701.

The product of its digits is 450, while the sum is 21.

The square root of 53312511 is about 7301.5416865207. The cubic root of 53312511 is about 376.3654187613.

Adding to 53312511 its reverse (11521335), we get a palindrome (64833846).

The spelling of 53312511 in words is "fifty-three million, three hundred twelve thousand, five hundred eleven".