51061839 has 8 divisors (see below), whose sum is σ = 69098880. Its totient is φ = 33533016.

The previous prime is 51061831. The next prime is 51061847. The reversal of 51061839 is 93816015.

It is an interprime number because it is at equal distance from previous prime (51061831) and next prime (51061847).

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

It is not a de Polignac number, because 51061839 - 2³ = 51061831 is a prime.

It is a super-2 number, since 2×51061839² = 5214622804123842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51061831) 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, 126819 + ... + 127220.

It is an arithmetic number, because the mean of its divisors is an integer number (8637360).

Almost surely, 2^51061839 is an apocalyptic number.

51061839 is a deficient number, since it is larger than the sum of its proper divisors (18037041).

51061839 is a wasteful number, since it uses less digits than its factorization.

51061839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254109.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 51061839 is about 7145.7567129031. The cubic root of 51061839 is about 370.9928023926.

The spelling of 51061839 in words is "fifty-one million, sixty-one thousand, eight hundred thirty-nine".