53571440 has 40 divisors (see below), whose sum is σ = 134137248. Its totient is φ = 19779840.

The previous prime is 53571409. The next prime is 53571487. The reversal of 53571440 is 4417535.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24716 + ... + 26795.

Almost surely, 2^53571440 is an apocalyptic number.

It is an amenable number.

53571440 is an abundant number, since it is smaller than the sum of its proper divisors (80565808).

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

53571440 is a wasteful number, since it uses less digits than its factorization.

53571440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51537 (or 51531 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 53571440 is about 7319.2513278340. The cubic root of 53571440 is about 376.9737473716.

Adding to 53571440 its reverse (4417535), we get a palindrome (57988975).

The spelling of 53571440 in words is "fifty-three million, five hundred seventy-one thousand, four hundred forty".