53211320 has 32 divisors (see below), whose sum is σ = 121078800. Its totient is φ = 21043968.

The previous prime is 53211307. The next prime is 53211329. The reversal of 53211320 is 2311235.

It is a super-2 number, since 2×53211320² = 5662889152284800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53211329) 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, 3914 + ... + 11033.

Almost surely, 2^53211320 is an apocalyptic number.

It is an amenable number.

53211320 is an abundant number, since it is smaller than the sum of its proper divisors (67867480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53211320 is a wasteful number, since it uses less digits than its factorization.

53211320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15047 (or 15043 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 53211320 is about 7294.6089682724. The cubic root of 53211320 is about 376.1271450196.

Adding to 53211320 its reverse (2311235), we get a palindrome (55522555).

The spelling of 53211320 in words is "fifty-three million, two hundred eleven thousand, three hundred twenty".