53117400 has 96 divisors (see below), whose sum is σ = 188202240. Its totient is φ = 12140160.

The previous prime is 53117387. The next prime is 53117411. The reversal of 53117400 is 471135.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2124 + ... + 10523.

It is an arithmetic number, because the mean of its divisors is an integer number (1960440).

Almost surely, 2^53117400 is an apocalyptic number.

53117400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53117400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94101120).

53117400 is an abundant number, since it is smaller than the sum of its proper divisors (135084840).

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

53117400 is a wasteful number, since it uses less digits than its factorization.

53117400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12673 (or 12664 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 53117400 is about 7288.1684942103. The cubic root of 53117400 is about 375.9057217980.

Adding to 53117400 its reverse (471135), we get a palindrome (53588535).

The spelling of 53117400 in words is "fifty-three million, one hundred seventeen thousand, four hundred".