51201101 has 4 divisors (see below), whose sum is σ = 58515552. Its totient is φ = 43886652.

The previous prime is 51201079. The next prime is 51201107. The reversal of 51201101 is 10110215.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10110215 = 5 ⋅2022043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51201101 is a prime.

It is a super-2 number, since 2×51201101² = 5243105487224402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51201107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3657215 + ... + 3657228.

It is an arithmetic number, because the mean of its divisors is an integer number (14628888).

Almost surely, 2^51201101 is an apocalyptic number.

It is an amenable number.

51201101 is a deficient number, since it is larger than the sum of its proper divisors (7314451).

51201101 is an equidigital number, since it uses as much as digits as its factorization.

51201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7314450.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 51201101 is about 7155.4944622996. The cubic root of 51201101 is about 371.3297683310.

Adding to 51201101 its reverse (10110215), we get a palindrome (61311316).

The spelling of 51201101 in words is "fifty-one million, two hundred one thousand, one hundred one".