51151224 has 32 divisors (see below), whose sum is σ = 128391120. Its totient is φ = 16982016.

The previous prime is 51151223. The next prime is 51151229. The reversal of 51151224 is 42215115.

It is a self number, because there is not a number n which added to its sum of digits gives 51151224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51151223) 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, 2022 + ... + 10314.

Almost surely, 2^51151224 is an apocalyptic number.

It is an amenable number.

51151224 is an abundant number, since it is smaller than the sum of its proper divisors (77239896).

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

51151224 is a wasteful number, since it uses less digits than its factorization.

51151224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8559 (or 8555 counting only the distinct ones).

The product of its digits is 400, while the sum is 21.

The square root of 51151224 is about 7152.0083892568. The cubic root of 51151224 is about 371.2091535285.

Adding to 51151224 its reverse (42215115), we get a palindrome (93366339).

The spelling of 51151224 in words is "fifty-one million, one hundred fifty-one thousand, two hundred twenty-four".