51256278 has 24 divisors (see below), whose sum is σ = 111194616. Its totient is φ = 17064000.

The previous prime is 51256277. The next prime is 51256279. The reversal of 51256278 is 87265215.

It is a happy number.

51256278 is a `hidden beast` number, since 5 + 1 + 25 + 627 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (51256277) and next prime (51256279).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51256277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20433 + ... + 22803.

It is an arithmetic number, because the mean of its divisors is an integer number (4633109).

Almost surely, 2^51256278 is an apocalyptic number.

51256278 is an abundant number, since it is smaller than the sum of its proper divisors (59938338).

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

51256278 is a wasteful number, since it uses less digits than its factorization.

51256278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580 (or 3577 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 51256278 is about 7159.3489927507. The cubic root of 51256278 is about 371.4631086087.

The spelling of 51256278 in words is "fifty-one million, two hundred fifty-six thousand, two hundred seventy-eight".