51353520 has 40 divisors (see below), whose sum is σ = 159196656. Its totient is φ = 13694208.

The previous prime is 51353513. The next prime is 51353537. The reversal of 51353520 is 2535315.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 106747 + ... + 107226.

Almost surely, 2^51353520 is an apocalyptic number.

It is an amenable number.

51353520 is an abundant number, since it is smaller than the sum of its proper divisors (107843136).

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

51353520 is a wasteful number, since it uses less digits than its factorization.

51353520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213989 (or 213983 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 51353520 is about 7166.1370346931. The cubic root of 51353520 is about 371.6978700724.

Adding to 51353520 its reverse (2535315), we get a palindrome (53888835).

The spelling of 51353520 in words is "fifty-one million, three hundred fifty-three thousand, five hundred twenty".