51542268 has 24 divisors (see below), whose sum is σ = 122825472. Its totient is φ = 16815024.

The previous prime is 51542263. The next prime is 51542297. The reversal of 51542268 is 86224515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51542261) 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, 45130 + ... + 46257.

It is an arithmetic number, because the mean of its divisors is an integer number (5117728).

Almost surely, 2^51542268 is an apocalyptic number.

It is an amenable number.

51542268 is an abundant number, since it is smaller than the sum of its proper divisors (71283204).

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

51542268 is a wasteful number, since it uses less digits than its factorization.

51542268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91441 (or 91439 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 51542268 is about 7179.2943942981. The cubic root of 51542268 is about 372.1527006353.

The spelling of 51542268 in words is "fifty-one million, five hundred forty-two thousand, two hundred sixty-eight".