51163601 has 4 divisors (see below), whose sum is σ = 51566592. Its totient is φ = 50760612.

The previous prime is 51163573. The next prime is 51163643. The reversal of 51163601 is 10636115.

It is a happy number.

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 51163601 - 2¹⁸ = 50901457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51163691) 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, 201305 + ... + 201558.

It is an arithmetic number, because the mean of its divisors is an integer number (12891648).

Almost surely, 2^51163601 is an apocalyptic number.

It is an amenable number.

51163601 is a deficient number, since it is larger than the sum of its proper divisors (402991).

51163601 is a wasteful number, since it uses less digits than its factorization.

51163601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402990.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 51163601 is about 7152.8736183439. The cubic root of 51163601 is about 371.2390914577.

Adding to 51163601 its reverse (10636115), we get a palindrome (61799716).

The spelling of 51163601 in words is "fifty-one million, one hundred sixty-three thousand, six hundred one".