51013438 has 16 divisors (see below), whose sum is σ = 87560064. Its totient is φ = 21835800.

The previous prime is 51013409. The next prime is 51013439. The reversal of 51013438 is 83431015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51013439) 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, 12981 + ... + 16447.

It is an arithmetic number, because the mean of its divisors is an integer number (5472504).

Almost surely, 2^51013438 is an apocalyptic number.

51013438 is a deficient number, since it is larger than the sum of its proper divisors (36546626).

51013438 is a wasteful number, since it uses less digits than its factorization.

51013438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4527.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 51013438 is about 7142.3692147634. The cubic root of 51013438 is about 370.8755452292.

The spelling of 51013438 in words is "fifty-one million, thirteen thousand, four hundred thirty-eight".