51577967 has 4 divisors (see below), whose sum is σ = 58946256. Its totient is φ = 44209680.

The previous prime is 51577961. The next prime is 51577987. The reversal of 51577967 is 76977515.

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

It is a cyclic number.

It is not a de Polignac number, because 51577967 - 2¹⁴ = 51561583 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 (51577961) 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, 3684134 + ... + 3684147.

It is an arithmetic number, because the mean of its divisors is an integer number (14736564).

Almost surely, 2^51577967 is an apocalyptic number.

51577967 is a deficient number, since it is larger than the sum of its proper divisors (7368289).

51577967 is an equidigital number, since it uses as much as digits as its factorization.

51577967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7368288.

The product of its digits is 463050, while the sum is 47.

The square root of 51577967 is about 7181.7802110619. The cubic root of 51577967 is about 372.2386004460.

The spelling of 51577967 in words is "fifty-one million, five hundred seventy-seven thousand, nine hundred sixty-seven".