53370221 has 4 divisors (see below), whose sum is σ = 56179200. Its totient is φ = 50561244.

The previous prime is 53370211. The next prime is 53370223. The reversal of 53370221 is 12207335.

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 a de Polignac number, because none of the positive numbers 2^k-53370221 is a prime.

It is a super-3 number, since 3×53370221³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53370223) 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, 1404461 + ... + 1404498.

It is an arithmetic number, because the mean of its divisors is an integer number (14044800).

Almost surely, 2^53370221 is an apocalyptic number.

It is an amenable number.

53370221 is a deficient number, since it is larger than the sum of its proper divisors (2808979).

53370221 is a wasteful number, since it uses less digits than its factorization.

53370221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808978.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 53370221 is about 7305.4925227530. The cubic root of 53370221 is about 376.5011731112.

Adding to 53370221 its reverse (12207335), we get a palindrome (65577556).

The spelling of 53370221 in words is "fifty-three million, three hundred seventy thousand, two hundred twenty-one".