51133642 has 16 divisors (see below), whose sum is σ = 89796672. Its totient is φ = 21379680.

The previous prime is 51133633. The next prime is 51133651. The reversal of 51133642 is 24633115.

It is an interprime number because it is at equal distance from previous prime (51133633) and next prime (51133651).

It is a super-2 number, since 2×51133642² = 5229298688368328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43968 + ... + 45115.

It is an arithmetic number, because the mean of its divisors is an integer number (5612292).

Almost surely, 2^51133642 is an apocalyptic number.

51133642 is a deficient number, since it is larger than the sum of its proper divisors (38663030).

51133642 is a wasteful number, since it uses less digits than its factorization.

51133642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89133.

The product of its digits is 2160, while the sum is 25.

The square root of 51133642 is about 7150.7791183898. The cubic root of 51133642 is about 371.1666172556.

Adding to 51133642 its reverse (24633115), we get a palindrome (75766757).

The spelling of 51133642 in words is "fifty-one million, one hundred thirty-three thousand, six hundred forty-two".