51687370 has 16 divisors (see below), whose sum is σ = 106328448. Its totient is φ = 17721360.

The previous prime is 51687359. The next prime is 51687379. The reversal of 51687370 is 7378615.

It is not an unprimeable number, because it can be changed into a prime (51687379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369126 + ... + 369265.

It is an arithmetic number, because the mean of its divisors is an integer number (6645528).

Almost surely, 2^51687370 is an apocalyptic number.

51687370 is an abundant number, since it is smaller than the sum of its proper divisors (54641078).

51687370 is a wasteful number, since it uses less digits than its factorization.

51687370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738405.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 51687370 is about 7189.3928811827. The cubic root of 51687370 is about 372.5016020230.

The spelling of 51687370 in words is "fifty-one million, six hundred eighty-seven thousand, three hundred seventy".