51857274 has 32 divisors (see below), whose sum is σ = 119871360. Its totient is φ = 14648832.

The previous prime is 51857261. The next prime is 51857287. The reversal of 51857274 is 47275815.

It is an interprime number because it is at equal distance from previous prime (51857261) and next prime (51857287).

It is a super-2 number, since 2×51857274² = 5378353733422152, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3199 + ... + 10674.

It is an arithmetic number, because the mean of its divisors is an integer number (3745980).

Almost surely, 2^51857274 is an apocalyptic number.

51857274 is an abundant number, since it is smaller than the sum of its proper divisors (68014086).

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

51857274 is a wasteful number, since it uses less digits than its factorization.

51857274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13974.

The product of its digits is 78400, while the sum is 39.

The square root of 51857274 is about 7201.1994834194. The cubic root of 51857274 is about 372.9093114966.

The spelling of 51857274 in words is "fifty-one million, eight hundred fifty-seven thousand, two hundred seventy-four".