51670845 has 16 divisors (see below), whose sum is σ = 91859520. Its totient is φ = 27557712.

The previous prime is 51670807. The next prime is 51670867. The reversal of 51670845 is 54807615.

It is not a de Polignac number, because 51670845 - 2⁶ = 51670781 is a prime.

It is a congruent 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, 191239 + ... + 191508.

It is an arithmetic number, because the mean of its divisors is an integer number (5741220).

Almost surely, 2^51670845 is an apocalyptic number.

It is an amenable number.

51670845 is a deficient number, since it is larger than the sum of its proper divisors (40188675).

51670845 is a wasteful number, since it uses less digits than its factorization.

51670845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382761 (or 382755 counting only the distinct ones).

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

The square root of 51670845 is about 7188.2435267595. The cubic root of 51670845 is about 372.4619002217.

The spelling of 51670845 in words is "fifty-one million, six hundred seventy thousand, eight hundred forty-five".