51980019 has 16 divisors (see below), whose sum is σ = 85300992. Its totient is φ = 27417888.

The previous prime is 51980011. The next prime is 51980021. The reversal of 51980019 is 91008915.

It is not a de Polignac number, because 51980019 - 2³ = 51980011 is a prime.

It is a super-2 number, since 2×51980019² = 5403844750480722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51980011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94929 + ... + 95474.

It is an arithmetic number, because the mean of its divisors is an integer number (5331312).

Almost surely, 2^51980019 is an apocalyptic number.

51980019 is a deficient number, since it is larger than the sum of its proper divisors (33320973).

51980019 is a wasteful number, since it uses less digits than its factorization.

51980019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190426.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 51980019 is about 7209.7169847366. The cubic root of 51980019 is about 373.2033023100.

The spelling of 51980019 in words is "fifty-one million, nine hundred eighty thousand, nineteen".