53521940 has 24 divisors (see below), whose sum is σ = 112813512. Its totient is φ = 21329280.

The previous prime is 53521939. The next prime is 53521973. The reversal of 53521940 is 4912535.

It can be written as a sum of positive squares in 4 ways, for example, as 3083536 + 50438404 = 1756^2 + 7102^2 .

It is a super-2 number, since 2×53521940² = 5729196122727200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 710 + ... + 10370.

It is an arithmetic number, because the mean of its divisors is an integer number (4700563).

Almost surely, 2^53521940 is an apocalyptic number.

It is an amenable number.

53521940 is an abundant number, since it is smaller than the sum of its proper divisors (59291572).

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

53521940 is a wasteful number, since it uses less digits than its factorization.

53521940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9947 (or 9945 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 53521940 is about 7315.8690529560. The cubic root of 53521940 is about 376.8576037026.

The spelling of 53521940 in words is "fifty-three million, five hundred twenty-one thousand, nine hundred forty".