51881534 has 4 divisors (see below), whose sum is σ = 77822304. Its totient is φ = 25940766.

The previous prime is 51881527. The next prime is 51881567. The reversal of 51881534 is 43518815.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51881494 and 51881503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12970382 + ... + 12970385.

It is an arithmetic number, because the mean of its divisors is an integer number (19455576).

Almost surely, 2^51881534 is an apocalyptic number.

51881534 is a deficient number, since it is larger than the sum of its proper divisors (25940770).

51881534 is a wasteful number, since it uses less digits than its factorization.

51881534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25940769.

The product of its digits is 19200, while the sum is 35.

The square root of 51881534 is about 7202.8837280634. The cubic root of 51881534 is about 372.9674542206.

The spelling of 51881534 in words is "fifty-one million, eight hundred eighty-one thousand, five hundred thirty-four".