51490605 has 8 divisors (see below), whose sum is σ = 82384992. Its totient is φ = 27461648.

The previous prime is 51490591. The next prime is 51490633. The reversal of 51490605 is 50609415.

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 51490605 - 2¹² = 51486509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1716339 + ... + 1716368.

It is an arithmetic number, because the mean of its divisors is an integer number (10298124).

Almost surely, 2^51490605 is an apocalyptic number.

It is an amenable number.

51490605 is a deficient number, since it is larger than the sum of its proper divisors (30894387).

51490605 is a wasteful number, since it uses less digits than its factorization.

51490605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432715.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 51490605 is about 7175.6954366807. The cubic root of 51490605 is about 372.0283175923.

It can be divided in two parts, 514 and 90605, that added together give a palindrome (91119).

The spelling of 51490605 in words is "fifty-one million, four hundred ninety thousand, six hundred five".