51111201 has 8 divisors (see below), whose sum is σ = 68185984. Its totient is φ = 34055280.

The previous prime is 51111199. The next prime is 51111211. The reversal of 51111201 is 10211115.

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

It is not a de Polignac number, because 51111201 - 2¹ = 51111199 is a prime.

It is a super-2 number, since 2×51111201² = 5224709735324802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51111211) 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, 3816 + ... + 10806.

It is an arithmetic number, because the mean of its divisors is an integer number (8523248).

Almost surely, 2^51111201 is an apocalyptic number.

It is an amenable number.

51111201 is a deficient number, since it is larger than the sum of its proper divisors (17074783).

51111201 is a wasteful number, since it uses less digits than its factorization.

51111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9431.

The product of its (nonzero) digits is 10, while the sum is 12.

The square root of 51111201 is about 7149.2098164762. The cubic root of 51111201 is about 371.1123113979.

Adding to 51111201 its reverse (10211115), we get a palindrome (61322316).

The spelling of 51111201 in words is "fifty-one million, one hundred eleven thousand, two hundred one".