51650237 has 4 divisors (see below), whose sum is σ = 51735936. Its totient is φ = 51564540.

The previous prime is 51650213. The next prime is 51650239. The reversal of 51650237 is 73205615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51650237 - 2⁶ = 51650173 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 (51650239) 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, 41939 + ... + 43152.

It is an arithmetic number, because the mean of its divisors is an integer number (12933984).

Almost surely, 2^51650237 is an apocalyptic number.

It is an amenable number.

51650237 is a deficient number, since it is larger than the sum of its proper divisors (85699).

51650237 is an equidigital number, since it uses as much as digits as its factorization.

51650237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85698.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 51650237 is about 7186.8099320909. The cubic root of 51650237 is about 372.4123770299.

The spelling of 51650237 in words is "fifty-one million, six hundred fifty thousand, two hundred thirty-seven".