51064669 has 4 divisors (see below), whose sum is σ = 53284896. Its totient is φ = 48844444.

The previous prime is 51064661. The next prime is 51064687. The reversal of 51064669 is 96646015.

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 51064669 - 2³ = 51064661 is a prime.

It is a super-2 number, since 2×51064669² = 5215200840159122, 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 (51064661) 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, 1110079 + ... + 1110124.

It is an arithmetic number, because the mean of its divisors is an integer number (13321224).

Almost surely, 2^51064669 is an apocalyptic number.

It is an amenable number.

51064669 is a deficient number, since it is larger than the sum of its proper divisors (2220227).

51064669 is a wasteful number, since it uses less digits than its factorization.

51064669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220226.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 51064669 is about 7145.9547297754. The cubic root of 51064669 is about 370.9996561099. Note that the first 3 decimals are identical.

The spelling of 51064669 in words is "fifty-one million, sixty-four thousand, six hundred sixty-nine".