51026819 has 4 divisors (see below), whose sum is σ = 52112544. Its totient is φ = 49941096.

The previous prime is 51026813. The next prime is 51026839. The reversal of 51026819 is 91862015.

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 51026819 - 2⁴ = 51026803 is a prime.

It is a super-2 number, since 2×51026819² = 5207472514517522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51026813) 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, 542792 + ... + 542885.

It is an arithmetic number, because the mean of its divisors is an integer number (13028136).

Almost surely, 2^51026819 is an apocalyptic number.

51026819 is a deficient number, since it is larger than the sum of its proper divisors (1085725).

51026819 is a wasteful number, since it uses less digits than its factorization.

51026819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085724.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 51026819 is about 7143.3058873326. The cubic root of 51026819 is about 370.9079697041.

The spelling of 51026819 in words is "fifty-one million, twenty-six thousand, eight hundred nineteen".