51340851 has 16 divisors (see below), whose sum is σ = 76396320. Its totient is φ = 34076160.

The previous prime is 51340843. The next prime is 51340859. The reversal of 51340851 is 15804315.

It is an interprime number because it is at equal distance from previous prime (51340843) and next prime (51340859).

It is not a de Polignac number, because 51340851 - 2³ = 51340843 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51340859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2211 + ... + 10371.

It is an arithmetic number, because the mean of its divisors is an integer number (4774770).

Almost surely, 2^51340851 is an apocalyptic number.

51340851 is a deficient number, since it is larger than the sum of its proper divisors (25055469).

51340851 is a wasteful number, since it uses less digits than its factorization.

51340851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8403 (or 8397 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 51340851 is about 7165.2530311218. The cubic root of 51340851 is about 371.6673013947.

The spelling of 51340851 in words is "fifty-one million, three hundred forty thousand, eight hundred fifty-one".