51620499 has 12 divisors (see below), whose sum is σ = 85214896. Its totient is φ = 29497392.

The previous prime is 51620497. The next prime is 51620509. The reversal of 51620499 is 99402615.

51620499 is a `hidden beast` number, since 5 + 162 + 0 + 499 = 666.

51620499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51620499 - 2¹ = 51620497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51620497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 409624 + ... + 409749.

Almost surely, 2^51620499 is an apocalyptic number.

51620499 is a deficient number, since it is larger than the sum of its proper divisors (33594397).

51620499 is a wasteful number, since it uses less digits than its factorization.

51620499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819386 (or 819383 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 51620499 is about 7184.7407051333. The cubic root of 51620499 is about 372.3408902626.

The spelling of 51620499 in words is "fifty-one million, six hundred twenty thousand, four hundred ninety-nine".