51947670 has 16 divisors (see below), whose sum is σ = 124674480. Its totient is φ = 13852704.

The previous prime is 51947669. The next prime is 51947681. The reversal of 51947670 is 7674915.

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 7 ways as a sum of consecutive naturals, for example, 865765 + ... + 865824.

It is an arithmetic number, because the mean of its divisors is an integer number (7792155).

Almost surely, 2^51947670 is an apocalyptic number.

51947670 is an abundant number, since it is smaller than the sum of its proper divisors (72726810).

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

51947670 is a wasteful number, since it uses less digits than its factorization.

51947670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731599.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 51947670 is about 7207.4732049450. The cubic root of 51947670 is about 373.1258670496.

The spelling of 51947670 in words is "fifty-one million, nine hundred forty-seven thousand, six hundred seventy".