51670551 has 4 divisors (see below), whose sum is σ = 68894072. Its totient is φ = 34447032.

The previous prime is 51670543. The next prime is 51670573. The reversal of 51670551 is 15507615.

51670551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51670551 - 2³ = 51670543 is a prime.

It is a super-3 number, since 3×51670551³ (a number of 24 digits) contains 333 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 (51670501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8611756 + ... + 8611761.

It is an arithmetic number, because the mean of its divisors is an integer number (17223518).

Almost surely, 2^51670551 is an apocalyptic number.

51670551 is a deficient number, since it is larger than the sum of its proper divisors (17223521).

51670551 is a wasteful number, since it uses less digits than its factorization.

51670551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17223520.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 51670551 is about 7188.2230766720. The cubic root of 51670551 is about 372.4611938013.

The spelling of 51670551 in words is "fifty-one million, six hundred seventy thousand, five hundred fifty-one".