51881457 has 8 divisors (see below), whose sum is σ = 72816160. Its totient is φ = 32767200.

The previous prime is 51881443. The next prime is 51881471. The reversal of 51881457 is 75418815.

It is an interprime number because it is at equal distance from previous prime (51881443) and next prime (51881471).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51881457 - 2¹² = 51877361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51881497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455044 + ... + 455157.

It is an arithmetic number, because the mean of its divisors is an integer number (9102020).

Almost surely, 2^51881457 is an apocalyptic number.

51881457 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

51881457 is a deficient number, since it is larger than the sum of its proper divisors (20934703).

51881457 is a wasteful number, since it uses less digits than its factorization.

51881457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910223.

The product of its digits is 44800, while the sum is 39.

The square root of 51881457 is about 7202.8783829800. The cubic root of 51881457 is about 372.9672697072.

The spelling of 51881457 in words is "fifty-one million, eight hundred eighty-one thousand, four hundred fifty-seven".