53213357 has 4 divisors (see below), whose sum is σ = 56014080. Its totient is φ = 50412636.

The previous prime is 53213351. The next prime is 53213371. The reversal of 53213357 is 75331235.

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 53213357 - 2⁴ = 53213341 is a prime.

It is a super-2 number, since 2×53213357² = 5663322726418898, 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 (53213351) 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, 1400333 + ... + 1400370.

It is an arithmetic number, because the mean of its divisors is an integer number (14003520).

Almost surely, 2^53213357 is an apocalyptic number.

It is an amenable number.

53213357 is a deficient number, since it is larger than the sum of its proper divisors (2800723).

53213357 is a wasteful number, since it uses less digits than its factorization.

53213357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800722.

The product of its digits is 9450, while the sum is 29.

The square root of 53213357 is about 7294.7485905958. The cubic root of 53213357 is about 376.1319445072.

The spelling of 53213357 in words is "fifty-three million, two hundred thirteen thousand, three hundred fifty-seven".