53661280 has 24 divisors (see below), whose sum is σ = 126775152. Its totient is φ = 21464448.

The previous prime is 53661269. The next prime is 53661287. The reversal of 53661280 is 8216635.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53661287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167532 + ... + 167851.

It is an arithmetic number, because the mean of its divisors is an integer number (5282298).

Almost surely, 2^53661280 is an apocalyptic number.

It is an amenable number.

53661280 is an abundant number, since it is smaller than the sum of its proper divisors (73113872).

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

53661280 is a wasteful number, since it uses less digits than its factorization.

53661280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335398 (or 335390 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 53661280 is about 7325.3859966557. The cubic root of 53661280 is about 377.1843596375.

It can be divided in two parts, 536 and 61280, that added together give a palindrome (61816).

The spelling of 53661280 in words is "fifty-three million, six hundred sixty-one thousand, two hundred eighty".