51005477 has 4 divisors (see below), whose sum is σ = 51723936. Its totient is φ = 50287020.

The previous prime is 51005473. The next prime is 51005483. The reversal of 51005477 is 77450015.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77450015 = 5 ⋅15490003.

It is a cyclic number.

It is not a de Polignac number, because 51005477 - 2² = 51005473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51005473) 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, 359123 + ... + 359264.

It is an arithmetic number, because the mean of its divisors is an integer number (12930984).

Almost surely, 2^51005477 is an apocalyptic number.

It is an amenable number.

51005477 is a deficient number, since it is larger than the sum of its proper divisors (718459).

51005477 is an equidigital number, since it uses as much as digits as its factorization.

51005477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718458.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 51005477 is about 7141.8118849491. The cubic root of 51005477 is about 370.8562516605.

The spelling of 51005477 in words is "fifty-one million, five thousand, four hundred seventy-seven".