51489087 has 16 divisors (see below), whose sum is σ = 74064480. Its totient is φ = 31629312.

The previous prime is 51489083. The next prime is 51489101. The reversal of 51489087 is 78098415.

It is not a de Polignac number, because 51489087 - 2² = 51489083 is a prime.

It is a super-2 number, since 2×51489087² = 5302252160187138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51489083) 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, 35839 + ... + 37247.

It is an arithmetic number, because the mean of its divisors is an integer number (4629030).

Almost surely, 2^51489087 is an apocalyptic number.

51489087 is a deficient number, since it is larger than the sum of its proper divisors (22575393).

51489087 is a wasteful number, since it uses less digits than its factorization.

51489087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 51489087 is about 7175.5896621811. The cubic root of 51489087 is about 372.0246616209.

The spelling of 51489087 in words is "fifty-one million, four hundred eighty-nine thousand, eighty-seven".