53357220 has 288 divisors, whose sum is σ = 203793408. Its totient is φ = 11022336.

The previous prime is 53357201. The next prime is 53357243. The reversal of 53357220 is 2275335.

It is a super-2 number, since 2×53357220² = 5693985852256800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1006714 + ... + 1006766.

It is an arithmetic number, because the mean of its divisors is an integer number (707616).

Almost surely, 2^53357220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53357220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101896704).

53357220 is an abundant number, since it is smaller than the sum of its proper divisors (150436188).

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

53357220 is a wasteful number, since it uses less digits than its factorization.

53357220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 53357220 is about 7304.6026585982. The cubic root of 53357220 is about 376.4705986998.

The spelling of 53357220 in words is "fifty-three million, three hundred fifty-seven thousand, two hundred twenty".