51654657 has 4 divisors (see below), whose sum is σ = 68872880. Its totient is φ = 34436436.

The previous prime is 51654643. The next prime is 51654661. The reversal of 51654657 is 75645615.

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 not a de Polignac number, because 51654657 - 2⁷ = 51654529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51655657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8609107 + ... + 8609112.

It is an arithmetic number, because the mean of its divisors is an integer number (17218220).

Almost surely, 2^51654657 is an apocalyptic number.

It is an amenable number.

51654657 is a deficient number, since it is larger than the sum of its proper divisors (17218223).

51654657 is a wasteful number, since it uses less digits than its factorization.

51654657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17218222.

The product of its digits is 126000, while the sum is 39.

The square root of 51654657 is about 7187.1174332969. The cubic root of 51654657 is about 372.4229998643.

The spelling of 51654657 in words is "fifty-one million, six hundred fifty-four thousand, six hundred fifty-seven".