51197705 has 12 divisors (see below), whose sum is σ = 66527820. Its totient is φ = 37806912.

The previous prime is 51197687. The next prime is 51197717. The reversal of 51197705 is 50779115.

It can be written as a sum of positive squares in 6 ways, for example, as 3200521 + 47997184 = 1789^2 + 6928^2 .

It is not a de Polignac number, because 51197705 - 2⁸ = 51197449 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29450 + ... + 31139.

It is an arithmetic number, because the mean of its divisors is an integer number (5543985).

Almost surely, 2^51197705 is an apocalyptic number.

It is an amenable number.

51197705 is a deficient number, since it is larger than the sum of its proper divisors (15330115).

51197705 is a wasteful number, since it uses less digits than its factorization.

51197705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60620 (or 60607 counting only the distinct ones).

The product of its (nonzero) digits is 11025, while the sum is 35.

The square root of 51197705 is about 7155.2571582019. The cubic root of 51197705 is about 371.3215584570.

The spelling of 51197705 in words is "fifty-one million, one hundred ninety-seven thousand, seven hundred five".