51897024 has 168 divisors, whose sum is σ = 159763968. Its totient is φ = 16692480.

The previous prime is 51897023. The next prime is 51897077. The reversal of 51897024 is 42079815.

It is a super-2 number, since 2×51897024² = 5386602200113152, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51897024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51897023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 730909 + ... + 730979.

It is an arithmetic number, because the mean of its divisors is an integer number (950976).

Almost surely, 2^51897024 is an apocalyptic number.

51897024 is a gapful number since it is divisible by the number (54) 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 51897024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79881984).

51897024 is an abundant number, since it is smaller than the sum of its proper divisors (107866944).

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

51897024 is an equidigital number, since it uses as much as digits as its factorization.

51897024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 51897024 is about 7203.9589115985. The cubic root of 51897024 is about 373.0045688453.

The spelling of 51897024 in words is "fifty-one million, eight hundred ninety-seven thousand, twenty-four".