51511148 has 12 divisors (see below), whose sum is σ = 97078800. Its totient is φ = 23774352.

The previous prime is 51511133. The next prime is 51511157. The reversal of 51511148 is 84111515.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 495248 + ... + 495351.

It is an arithmetic number, because the mean of its divisors is an integer number (8089900).

Almost surely, 2^51511148 is an apocalyptic number.

It is an amenable number.

51511148 is a deficient number, since it is larger than the sum of its proper divisors (45567652).

51511148 is a wasteful number, since it uses less digits than its factorization.

51511148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990616 (or 990614 counting only the distinct ones).

The product of its digits is 800, while the sum is 26.

The square root of 51511148 is about 7177.1267231393. The cubic root of 51511148 is about 372.0777865623.

The spelling of 51511148 in words is "fifty-one million, five hundred eleven thousand, one hundred forty-eight".