51273642 has 16 divisors (see below), whose sum is σ = 117196992. Its totient is φ = 14649600.

The previous prime is 51273641. The next prime is 51273643. The reversal of 51273642 is 24637215.

It is an interprime number because it is at equal distance from previous prime (51273641) and next prime (51273643).

It is not an unprimeable number, because it can be changed into a prime (51273641) 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, 610359 + ... + 610442.

It is an arithmetic number, because the mean of its divisors is an integer number (7324812).

Almost surely, 2^51273642 is an apocalyptic number.

51273642 is an abundant number, since it is smaller than the sum of its proper divisors (65923350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51273642 is a wasteful number, since it uses less digits than its factorization.

51273642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220813.

The product of its digits is 10080, while the sum is 30.

The square root of 51273642 is about 7160.5615701564. The cubic root of 51273642 is about 371.5050505096.

It can be divided in two parts, 51273 and 642, that added together give a palindrome (51915).

The spelling of 51273642 in words is "fifty-one million, two hundred seventy-three thousand, six hundred forty-two".