51001101 has 6 divisors (see below), whose sum is σ = 73668270. Its totient is φ = 34000728.

The previous prime is 51001043. The next prime is 51001109. The reversal of 51001101 is 10110015.

It can be written as a sum of positive squares in only one way, i.e., 44756100 + 6245001 = 6690^2 + 2499^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51001101 is a prime.

It is a super-2 number, since 2×51001101² = 5202224606424402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 5666789 = 51001101 / (5 + 1 + 0 + 0 + 1 + 1 + 0 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2833386 + ... + 2833403.

It is an arithmetic number, because the mean of its divisors is an integer number (12278045).

Almost surely, 2^51001101 is an apocalyptic number.

It is an amenable number.

51001101 is a deficient number, since it is larger than the sum of its proper divisors (22667169).

51001101 is a wasteful number, since it uses less digits than its factorization.

51001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5666795 (or 5666792 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 9.

The square root of 51001101 is about 7141.5055135454. The cubic root of 51001101 is about 370.8456455226.

Adding to 51001101 its reverse (10110015), we get a palindrome (61111116).

The spelling of 51001101 in words is "fifty-one million, one thousand, one hundred one".