53213317 has 4 divisors (see below), whose sum is σ = 54450880. Its totient is φ = 51975756.

The previous prime is 53213309. The next prime is 53213323. The reversal of 53213317 is 71331235.

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.

It is a cyclic number.

It is not a de Polignac number, because 53213317 - 2³ = 53213309 is a prime.

It is a super-2 number, since 2×53213317² = 5663314212284978, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53213291 and 53213300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53213617) 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, 618717 + ... + 618802.

It is an arithmetic number, because the mean of its divisors is an integer number (13612720).

Almost surely, 2^53213317 is an apocalyptic number.

It is an amenable number.

53213317 is a deficient number, since it is larger than the sum of its proper divisors (1237563).

53213317 is a wasteful number, since it uses less digits than its factorization.

53213317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237562.

The product of its digits is 1890, while the sum is 25.

The square root of 53213317 is about 7294.7458488970. The cubic root of 53213317 is about 376.1318502622.

The spelling of 53213317 in words is "fifty-three million, two hundred thirteen thousand, three hundred seventeen".