51133772 has 12 divisors (see below), whose sum is σ = 89572560. Its totient is φ = 25541616.

The previous prime is 51133763. The next prime is 51133781. The reversal of 51133772 is 27733115.

It is an interprime number because it is at equal distance from previous prime (51133763) and next prime (51133781).

It is a super-2 number, since 2×51133772² = 5229325277895968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328 + ... + 10199.

It is an arithmetic number, because the mean of its divisors is an integer number (7464380).

Almost surely, 2^51133772 is an apocalyptic number.

It is an amenable number.

51133772 is a deficient number, since it is larger than the sum of its proper divisors (38438788).

51133772 is a wasteful number, since it uses less digits than its factorization.

51133772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12640 (or 12638 counting only the distinct ones).

The product of its digits is 4410, while the sum is 29.

The square root of 51133772 is about 7150.7882083026. The cubic root of 51133772 is about 371.1669318014.

Adding to 51133772 its reverse (27733115), we get a palindrome (78866887).

The spelling of 51133772 in words is "fifty-one million, one hundred thirty-three thousand, seven hundred seventy-two".