53221550 has 12 divisors (see below), whose sum is σ = 98992176. Its totient is φ = 21288600.

The previous prime is 53221541. The next prime is 53221559. The reversal of 53221550 is 5512235.

It is an interprime number because it is at equal distance from previous prime (53221541) and next prime (53221559).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53221559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 532166 + ... + 532265.

It is an arithmetic number, because the mean of its divisors is an integer number (8249348).

Almost surely, 2^53221550 is an apocalyptic number.

53221550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

53221550 is a deficient number, since it is larger than the sum of its proper divisors (45770626).

53221550 is a wasteful number, since it uses less digits than its factorization.

53221550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064443 (or 1064438 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 53221550 is about 7295.3101373417. The cubic root of 53221550 is about 376.1512472478.

Adding to 53221550 its reverse (5512235), we get a palindrome (58733785).

The spelling of 53221550 in words is "fifty-three million, two hundred twenty-one thousand, five hundred fifty".