51252278 has 64 divisors (see below), whose sum is σ = 100251648. Its totient is φ = 19077120.

The previous prime is 51252241. The next prime is 51252281. The reversal of 51252278 is 87225215.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 528326 + ... + 528422.

It is an arithmetic number, because the mean of its divisors is an integer number (1566432).

Almost surely, 2^51252278 is an apocalyptic number.

51252278 is a deficient number, since it is larger than the sum of its proper divisors (48999370).

51252278 is a wasteful number, since it uses less digits than its factorization.

51252278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237.

The product of its digits is 11200, while the sum is 32.

The square root of 51252278 is about 7159.0696322916. The cubic root of 51252278 is about 371.4534454601.

The spelling of 51252278 in words is "fifty-one million, two hundred fifty-two thousand, two hundred seventy-eight".