51351438 has 16 divisors (see below), whose sum is σ = 106016256. Its totient is φ = 16564920.

The previous prime is 51351437. The next prime is 51351439. The reversal of 51351438 is 83415315.

It is an interprime number because it is at equal distance from previous prime (51351437) and next prime (51351439).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51351437) 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, 137856 + ... + 138227.

It is an arithmetic number, because the mean of its divisors is an integer number (6626016).

Almost surely, 2^51351438 is an apocalyptic number.

51351438 is an abundant number, since it is smaller than the sum of its proper divisors (54664818).

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

51351438 is a wasteful number, since it uses less digits than its factorization.

51351438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276119.

The product of its digits is 7200, while the sum is 30.

The square root of 51351438 is about 7165.9917666712. The cubic root of 51351438 is about 371.6928468178.

The spelling of 51351438 in words is "fifty-one million, three hundred fifty-one thousand, four hundred thirty-eight".