51576487 has 4 divisors (see below), whose sum is σ = 54610416. Its totient is φ = 48542560.

The previous prime is 51576463. The next prime is 51576491. The reversal of 51576487 is 78467515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51576487 - 2⁷ = 51576359 is a prime.

It is a super-2 number, since 2×51576487² = 5320268022522338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51576407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1516939 + ... + 1516972.

It is an arithmetic number, because the mean of its divisors is an integer number (13652604).

Almost surely, 2^51576487 is an apocalyptic number.

51576487 is a deficient number, since it is larger than the sum of its proper divisors (3033929).

51576487 is a wasteful number, since it uses less digits than its factorization.

51576487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033928.

The product of its digits is 235200, while the sum is 43.

The square root of 51576487 is about 7181.6771718033. The cubic root of 51576487 is about 372.2350400213.

It can be divided in two parts, 5 and 1576487, that multiplied together give a triangular number (7882435 = T₃₉₇₀).

The spelling of 51576487 in words is "fifty-one million, five hundred seventy-six thousand, four hundred eighty-seven".