51147270 has 24 divisors (see below), whose sum is σ = 132983136. Its totient is φ = 13639248.

The previous prime is 51147263. The next prime is 51147287. The reversal of 51147270 is 7274115.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284062 + ... + 284241.

It is an arithmetic number, because the mean of its divisors is an integer number (5540964).

Almost surely, 2^51147270 is an apocalyptic number.

51147270 is an abundant number, since it is smaller than the sum of its proper divisors (81835866).

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

51147270 is a wasteful number, since it uses less digits than its factorization.

51147270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568316 (or 568313 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 51147270 is about 7151.7319580644. The cubic root of 51147270 is about 371.1995884344.

The spelling of 51147270 in words is "fifty-one million, one hundred forty-seven thousand, two hundred seventy".