53525640 has 96 divisors (see below), whose sum is σ = 186814080. Its totient is φ = 12233088.

The previous prime is 53525629. The next prime is 53525653. The reversal of 53525640 is 4652535.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 53525598 and 53525607.

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, 1329 + ... + 10431.

It is an arithmetic number, because the mean of its divisors is an integer number (1945980).

Almost surely, 2^53525640 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 53525640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93407040).

53525640 is an abundant number, since it is smaller than the sum of its proper divisors (133288440).

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

53525640 is a wasteful number, since it uses less digits than its factorization.

53525640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9131 (or 9120 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 53525640 is about 7316.1219235330. The cubic root of 53525640 is about 376.8662876243.

The spelling of 53525640 in words is "fifty-three million, five hundred twenty-five thousand, six hundred forty".