51551667 has 32 divisors (see below), whose sum is σ = 83496960. Its totient is φ = 31294080.

The previous prime is 51551657. The next prime is 51551683. The reversal of 51551667 is 76615515.

It is not a de Polignac number, because 51551667 - 2¹⁰ = 51550643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51551627) 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, 12418 + ... + 16040.

It is an arithmetic number, because the mean of its divisors is an integer number (2609280).

Almost surely, 2^51551667 is an apocalyptic number.

51551667 is a deficient number, since it is larger than the sum of its proper divisors (31945293).

51551667 is a wasteful number, since it uses less digits than its factorization.

51551667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680 (or 3674 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 51551667 is about 7179.9489552503. The cubic root of 51551667 is about 372.1753205857.

The spelling of 51551667 in words is "fifty-one million, five hundred fifty-one thousand, six hundred sixty-seven".