51755501 has 4 divisors (see below), whose sum is σ = 59149152. Its totient is φ = 44361852.

The previous prime is 51755479. The next prime is 51755503. The reversal of 51755501 is 10555715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51755501 - 2⁶ = 51755437 is a prime.

It is a super-2 number, since 2×51755501² = 5357263767522002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51755503) 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, 3696815 + ... + 3696828.

It is an arithmetic number, because the mean of its divisors is an integer number (14787288).

Almost surely, 2^51755501 is an apocalyptic number.

It is an amenable number.

51755501 is a deficient number, since it is larger than the sum of its proper divisors (7393651).

51755501 is an equidigital number, since it uses as much as digits as its factorization.

51755501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7393650.

The product of its (nonzero) digits is 4375, while the sum is 29.

The square root of 51755501 is about 7194.1296207394. The cubic root of 51755501 is about 372.6651994606.

The spelling of 51755501 in words is "fifty-one million, seven hundred fifty-five thousand, five hundred one".