51280619 has 16 divisors (see below), whose sum is σ = 59730048. Its totient is φ = 43594752.

The previous prime is 51280609. The next prime is 51280633. The reversal of 51280619 is 91608215.

It is a cyclic number.

It is not a de Polignac number, because 51280619 - 2¹² = 51276523 is a prime.

It is a super-2 number, since 2×51280619² = 5259403770046322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51280609) 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, 7919 + ... + 12855.

It is an arithmetic number, because the mean of its divisors is an integer number (3733128).

Almost surely, 2^51280619 is an apocalyptic number.

51280619 is a deficient number, since it is larger than the sum of its proper divisors (8449429).

51280619 is a wasteful number, since it uses less digits than its factorization.

51280619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5014.

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

The square root of 51280619 is about 7161.0487360442. The cubic root of 51280619 is about 371.5219004483.

The spelling of 51280619 in words is "fifty-one million, two hundred eighty thousand, six hundred nineteen".