51653280 has 96 divisors (see below), whose sum is σ = 185963904. Its totient is φ = 11805696.

The previous prime is 51653269. The next prime is 51653291. The reversal of 51653280 is 8235615.

It is an interprime number because it is at equal distance from previous prime (51653269) and next prime (51653291).

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×51653280² = 5336122669516800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4327 + ... + 11046.

It is an arithmetic number, because the mean of its divisors is an integer number (1937124).

Almost surely, 2^51653280 is an apocalyptic number.

It is an amenable number.

51653280 is an abundant number, since it is smaller than the sum of its proper divisors (134310624).

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

51653280 is a wasteful number, since it uses less digits than its factorization.

51653280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15398 (or 15390 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 51653280 is about 7187.0216362552. The cubic root of 51653280 is about 372.4196905078.

Adding to 51653280 its reverse (8235615), we get a palindrome (59888895).

The spelling of 51653280 in words is "fifty-one million, six hundred fifty-three thousand, two hundred eighty".