51111541 has 8 divisors (see below), whose sum is σ = 56531384. Its totient is φ = 45904320.

The previous prime is 51111493. The next prime is 51111559. The reversal of 51111541 is 14511115.

It can be written as a sum of positive squares in 4 ways, for example, as 60516 + 51051025 = 246^2 + 7145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51111541 - 2⁹ = 51111029 is a prime.

It is a super-2 number, since 2×51111541² = 5224779246789362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51111581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52650 + ... + 53611.

It is an arithmetic number, because the mean of its divisors is an integer number (7066423).

Almost surely, 2^51111541 is an apocalyptic number.

It is an amenable number.

51111541 is a deficient number, since it is larger than the sum of its proper divisors (5419843).

51111541 is a wasteful number, since it uses less digits than its factorization.

51111541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106311.

The product of its digits is 100, while the sum is 19.

The square root of 51111541 is about 7149.2335952884. The cubic root of 51111541 is about 371.1131342959.

Adding to 51111541 its reverse (14511115), we get a palindrome (65622656).

The spelling of 51111541 in words is "fifty-one million, one hundred eleven thousand, five hundred forty-one".