51111534 has 32 divisors (see below), whose sum is σ = 105377184. Its totient is φ = 16519680.

The previous prime is 51111493. The next prime is 51111559. The reversal of 51111534 is 43511115.

It is a happy number.

It is a super-2 number, since 2×51111534² = 5224777815666312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51111534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25762 + ... + 27674.

It is an arithmetic number, because the mean of its divisors is an integer number (3293037).

Almost surely, 2^51111534 is an apocalyptic number.

51111534 is an abundant number, since it is smaller than the sum of its proper divisors (54265650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51111534 is a wasteful number, since it uses less digits than its factorization.

51111534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052.

The product of its digits is 300, while the sum is 21.

The square root of 51111534 is about 7149.2331057254. The cubic root of 51111534 is about 371.1131173539.

Adding to 51111534 its reverse (43511115), we get a palindrome (94622649).

The spelling of 51111534 in words is "fifty-one million, one hundred eleven thousand, five hundred thirty-four".