51897911 has 8 divisors (see below), whose sum is σ = 58831920. Its totient is φ = 45384192.

The previous prime is 51897899. The next prime is 51897931. The reversal of 51897911 is 11979815.

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

It is a cyclic number.

It is not a de Polignac number, because 51897911 - 2¹⁴ = 51881527 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 (51897931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104810 + ... + 105303.

It is an arithmetic number, because the mean of its divisors is an integer number (7353990).

Almost surely, 2^51897911 is an apocalyptic number.

51897911 is a deficient number, since it is larger than the sum of its proper divisors (6934009).

51897911 is a wasteful number, since it uses less digits than its factorization.

51897911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210145.

The product of its digits is 22680, while the sum is 41.

The square root of 51897911 is about 7204.0204747072. The cubic root of 51897911 is about 373.0066939072.

The spelling of 51897911 in words is "fifty-one million, eight hundred ninety-seven thousand, nine hundred eleven".