51111701 has 4 divisors (see below), whose sum is σ = 52199232. Its totient is φ = 50024172.

The previous prime is 51111679. The next prime is 51111703. The reversal of 51111701 is 10711115.

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 51111701 - 2⁶ = 51111637 is a prime.

It is a super-2 number, since 2×51111701² = 5224811958226802, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51111701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51111703) 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, 543695 + ... + 543788.

It is an arithmetic number, because the mean of its divisors is an integer number (13049808).

Almost surely, 2^51111701 is an apocalyptic number.

It is an amenable number.

51111701 is a deficient number, since it is larger than the sum of its proper divisors (1087531).

51111701 is a wasteful number, since it uses less digits than its factorization.

51111701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087530.

The product of its (nonzero) digits is 35, while the sum is 17.

The square root of 51111701 is about 7149.2447852903. The cubic root of 51111701 is about 371.1135215407.

Adding to 51111701 its reverse (10711115), we get a palindrome (61822816).

The spelling of 51111701 in words is "fifty-one million, one hundred eleven thousand, seven hundred one".