51770487 has 4 divisors (see below), whose sum is σ = 69027320. Its totient is φ = 34513656.

The previous prime is 51770483. The next prime is 51770489. The reversal of 51770487 is 78407715.

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

It is not a de Polignac number, because 51770487 - 2² = 51770483 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 (51770483) 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, 8628412 + ... + 8628417.

It is an arithmetic number, because the mean of its divisors is an integer number (17256830).

Almost surely, 2^51770487 is an apocalyptic number.

51770487 is a deficient number, since it is larger than the sum of its proper divisors (17256833).

51770487 is a wasteful number, since it uses less digits than its factorization.

51770487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17256832.

The product of its (nonzero) digits is 54880, while the sum is 39.

The square root of 51770487 is about 7195.1710890013. The cubic root of 51770487 is about 372.7011648596.

The spelling of 51770487 in words is "fifty-one million, seven hundred seventy thousand, four hundred eighty-seven".