51390335 has 4 divisors (see below), whose sum is σ = 61668408. Its totient is φ = 41112264.

The previous prime is 51390331. The next prime is 51390347. The reversal of 51390335 is 53309315.

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

It is a cyclic number.

It is not a de Polignac number, because 51390335 - 2² = 51390331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51390298 and 51390307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51390331) 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, 5139029 + ... + 5139038.

It is an arithmetic number, because the mean of its divisors is an integer number (15417102).

Almost surely, 2^51390335 is an apocalyptic number.

51390335 is a deficient number, since it is larger than the sum of its proper divisors (10278073).

51390335 is a wasteful number, since it uses less digits than its factorization.

51390335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10278072.

The product of its (nonzero) digits is 6075, while the sum is 29.

The square root of 51390335 is about 7168.7052526938. The cubic root of 51390335 is about 371.7866714398.

The spelling of 51390335 in words is "fifty-one million, three hundred ninety thousand, three hundred thirty-five".