51021153 has 24 divisors (see below), whose sum is σ = 77680512. Its totient is φ = 32205888.

The previous prime is 51021149. The next prime is 51021161. The reversal of 51021153 is 35112015.

51021153 is a `hidden beast` number, since 510 + 2 + 1 + 153 = 666.

It is not a de Polignac number, because 51021153 - 2² = 51021149 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51021143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20125 + ... + 22517.

It is an arithmetic number, because the mean of its divisors is an integer number (3236688).

Almost surely, 2^51021153 is an apocalyptic number.

It is an amenable number.

51021153 is a deficient number, since it is larger than the sum of its proper divisors (26659359).

51021153 is a wasteful number, since it uses less digits than its factorization.

51021153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525 (or 2522 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 51021153 is about 7142.9092812383. The cubic root of 51021153 is about 370.8942406992.

Adding to 51021153 its reverse (35112015), we get a palindrome (86133168).

The spelling of 51021153 in words is "fifty-one million, twenty-one thousand, one hundred fifty-three".