53531840 has 56 divisors (see below), whose sum is σ = 128546352. Its totient is φ = 21232640.

The previous prime is 53531839. The next prime is 53531843. The reversal of 53531840 is 4813535.

53531840 = T₄₁₁ + T₄₁₂ + ... + T₇₃₀.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (53531843) 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, 41282 + ... + 42558.

Almost surely, 2^53531840 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 53531840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64273176).

53531840 is an abundant number, since it is smaller than the sum of its proper divisors (75014512).

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

53531840 is a wasteful number, since it uses less digits than its factorization.

53531840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425 (or 1415 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 53531840 is about 7316.5456330156. The cubic root of 53531840 is about 376.8808381635.

The spelling of 53531840 in words is "fifty-three million, five hundred thirty-one thousand, eight hundred forty".