51773487 has 4 divisors (see below), whose sum is σ = 69031320. Its totient is φ = 34515656.

The previous prime is 51773473. The next prime is 51773489. The reversal of 51773487 is 78437715.

It is a happy number.

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 51773487 - 2¹⁴ = 51757103 is a prime.

It is a super-2 number, since 2×51773487² = 5360987912278338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51773489) 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, 8628912 + ... + 8628917.

It is an arithmetic number, because the mean of its divisors is an integer number (17257830).

Almost surely, 2^51773487 is an apocalyptic number.

51773487 is a deficient number, since it is larger than the sum of its proper divisors (17257833).

51773487 is a wasteful number, since it uses less digits than its factorization.

51773487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17257832.

The product of its digits is 164640, while the sum is 42.

The square root of 51773487 is about 7195.3795591338. The cubic root of 51773487 is about 372.7083638254.

The spelling of 51773487 in words is "fifty-one million, seven hundred seventy-three thousand, four hundred eighty-seven".