51113278 has 4 divisors (see below), whose sum is σ = 76669920. Its totient is φ = 25556638.

The previous prime is 51113267. The next prime is 51113281. The reversal of 51113278 is 87231115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87231115 = 5 ⋅17446223.

It is a super-2 number, since 2×51113278² = 5225134375810568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12778318 + ... + 12778321.

It is an arithmetic number, because the mean of its divisors is an integer number (19167480).

Almost surely, 2^51113278 is an apocalyptic number.

51113278 is a deficient number, since it is larger than the sum of its proper divisors (25556642).

51113278 is a wasteful number, since it uses less digits than its factorization.

51113278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25556641.

The product of its digits is 1680, while the sum is 28.

The square root of 51113278 is about 7149.3550758093. The cubic root of 51113278 is about 371.1173382793.

The spelling of 51113278 in words is "fifty-one million, one hundred thirteen thousand, two hundred seventy-eight".