51577516 has 6 divisors (see below), whose sum is σ = 90260660. Its totient is φ = 25788756.

The previous prime is 51577499. The next prime is 51577517. The reversal of 51577516 is 61577515.

It is not an unprimeable number, because it can be changed into a prime (51577517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6447186 + ... + 6447193.

Almost surely, 2^51577516 is an apocalyptic number.

It is an amenable number.

51577516 is a deficient number, since it is larger than the sum of its proper divisors (38683144).

51577516 is a wasteful number, since it uses less digits than its factorization.

51577516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12894383 (or 12894381 counting only the distinct ones).

The product of its digits is 36750, while the sum is 37.

The square root of 51577516 is about 7181.7488120931. The cubic root of 51577516 is about 372.2375154859.

Subtracting 51577516 from its reverse (61577515), we obtain a palindrome (9999999).

The spelling of 51577516 in words is "fifty-one million, five hundred seventy-seven thousand, five hundred sixteen".