51230101 has 4 divisors (see below), whose sum is σ = 55170892. Its totient is φ = 47289312.

The previous prime is 51230083. The next prime is 51230117. The reversal of 51230101 is 10103215.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31640625 + 19589476 = 5625^2 + 4426^2 .

It is a cyclic number.

It is not a de Polignac number, because 51230101 - 2¹¹ = 51228053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 3940777 = 51230101 / (5 + 1 + 2 + 3 + 0 + 1 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51230161) 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, 1970376 + ... + 1970401.

It is an arithmetic number, because the mean of its divisors is an integer number (13792723).

Almost surely, 2^51230101 is an apocalyptic number.

It is an amenable number.

51230101 is a deficient number, since it is larger than the sum of its proper divisors (3940791).

51230101 is a wasteful number, since it uses less digits than its factorization.

51230101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940790.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 51230101 is about 7157.5205902603. The cubic root of 51230101 is about 371.3998614256.

Adding to 51230101 its reverse (10103215), we get a palindrome (61333316).

The spelling of 51230101 in words is "fifty-one million, two hundred thirty thousand, one hundred one".