51980049 has 40 divisors (see below), whose sum is σ = 85412448. Its totient is φ = 31242240.

The previous prime is 51980039. The next prime is 51980051. The reversal of 51980049 is 94008915.

It is not a de Polignac number, because 51980049 - 2¹⁷ = 51848977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51979995 and 51980022.

It is not an unprimeable number, because it can be changed into a prime (51980009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 202129 + ... + 202385.

Almost surely, 2^51980049 is an apocalyptic number.

It is an amenable number.

51980049 is a deficient number, since it is larger than the sum of its proper divisors (33432399).

51980049 is a wasteful number, since it uses less digits than its factorization.

51980049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 51980049 is about 7209.7190652618. The cubic root of 51980049 is about 373.2033741075.

It can be divided in two parts, 51 and 980049, that added together give a square (980100 = 990²).

The spelling of 51980049 in words is "fifty-one million, nine hundred eighty thousand, forty-nine".