51687195 has 32 divisors (see below), whose sum is σ = 95592960. Its totient is φ = 23358720.

The previous prime is 51687131. The next prime is 51687197. The reversal of 51687195 is 59178615.

It is not a de Polignac number, because 51687195 - 2⁶ = 51687131 is a prime.

It is a super-2 number, since 2×51687195² = 5343132253936050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51687197) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6580 + ... + 12110.

It is an arithmetic number, because the mean of its divisors is an integer number (2987280).

Almost surely, 2^51687195 is an apocalyptic number.

51687195 is a deficient number, since it is larger than the sum of its proper divisors (43905765).

51687195 is a wasteful number, since it uses less digits than its factorization.

51687195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5635.

The product of its digits is 75600, while the sum is 42.

The square root of 51687195 is about 7189.3807104646. The cubic root of 51687195 is about 372.5011816247.

The spelling of 51687195 in words is "fifty-one million, six hundred eighty-seven thousand, one hundred ninety-five".