51587907 has 16 divisors (see below), whose sum is σ = 82748160. Its totient is φ = 27927072.

The previous prime is 51587849. The next prime is 51587909. The reversal of 51587907 is 70978515.

It is not a de Polignac number, because 51587907 - 2¹⁶ = 51522371 is a prime.

It is a super-2 number, since 2×51587907² = 5322624297281298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51587909) 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, 64248 + ... + 65045.

It is an arithmetic number, because the mean of its divisors is an integer number (5171760).

Almost surely, 2^51587907 is an apocalyptic number.

51587907 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

51587907 is a deficient number, since it is larger than the sum of its proper divisors (31160253).

51587907 is a wasteful number, since it uses less digits than its factorization.

51587907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129322.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 51587907 is about 7182.4722066987. The cubic root of 51587907 is about 372.2625112632.

The spelling of 51587907 in words is "fifty-one million, five hundred eighty-seven thousand, nine hundred seven".