51340242 has 32 divisors (see below), whose sum is σ = 109624320. Its totient is φ = 15981840.

The previous prime is 51340229. The next prime is 51340249. The reversal of 51340242 is 24204315.

It is not an unprimeable number, because it can be changed into a prime (51340249) 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, 4923 + ... + 11265.

It is an arithmetic number, because the mean of its divisors is an integer number (3425760).

Almost surely, 2^51340242 is an apocalyptic number.

51340242 is an abundant number, since it is smaller than the sum of its proper divisors (58284078).

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

51340242 is a wasteful number, since it uses less digits than its factorization.

51340242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6438.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 51340242 is about 7165.2105342411. The cubic root of 51340242 is about 371.6658318289.

Adding to 51340242 its reverse (24204315), we get a palindrome (75544557).

It can be divided in two parts, 513 and 40242, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 51340242 in words is "fifty-one million, three hundred forty thousand, two hundred forty-two".