52778534 has 4 divisors (see below), whose sum is σ = 79167804. Its totient is φ = 26389266.

The previous prime is 52778527. The next prime is 52778543. The reversal of 52778534 is 43587725.

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 = 52778491 and 52778500.

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, 13194632 + ... + 13194635.

It is an arithmetic number, because the mean of its divisors is an integer number (19791951).

Almost surely, 2^52778534 is an apocalyptic number.

52778534 is a deficient number, since it is larger than the sum of its proper divisors (26389270).

52778534 is a wasteful number, since it uses less digits than its factorization.

52778534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26389269.

The product of its digits is 235200, while the sum is 41.

The square root of 52778534 is about 7264.8836191642. The cubic root of 52778534 is about 375.1046439815.

The spelling of 52778534 in words is "fifty-two million, seven hundred seventy-eight thousand, five hundred thirty-four".