51650807 has 4 divisors (see below), whose sum is σ = 55623960. Its totient is φ = 47677656.

The previous prime is 51650789. The next prime is 51650813. The reversal of 51650807 is 70805615.

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

It is not a de Polignac number, because 51650807 - 2⁸ = 51650551 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 (51653807) 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, 1986557 + ... + 1986582.

It is an arithmetic number, because the mean of its divisors is an integer number (13905990).

Almost surely, 2^51650807 is an apocalyptic number.

51650807 is a deficient number, since it is larger than the sum of its proper divisors (3973153).

51650807 is a wasteful number, since it uses less digits than its factorization.

51650807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973152.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 51650807 is about 7186.8495879627. The cubic root of 51650807 is about 372.4137469769.

The spelling of 51650807 in words is "fifty-one million, six hundred fifty thousand, eight hundred seven".