51711890 has 8 divisors (see below), whose sum is σ = 93081420. Its totient is φ = 20684752.

The previous prime is 51711859. The next prime is 51711911. The reversal of 51711890 is 9811715.

It can be written as a sum of positive squares in 2 ways, for example, as 50822641 + 889249 = 7129^2 + 943^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2585585 + ... + 2585604.

Almost surely, 2^51711890 is an apocalyptic number.

51711890 is a deficient number, since it is larger than the sum of its proper divisors (41369530).

51711890 is a wasteful number, since it uses less digits than its factorization.

51711890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171196.

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 51711890 is about 7191.0979690170. The cubic root of 51711890 is about 372.5604964579.

The spelling of 51711890 in words is "fifty-one million, seven hundred eleven thousand, eight hundred ninety".