51538044 has 12 divisors (see below), whose sum is σ = 120255464. Its totient is φ = 17179344.

The previous prime is 51538043. The next prime is 51538049. The reversal of 51538044 is 44083515.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51538043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2147407 + ... + 2147430.

Almost surely, 2^51538044 is an apocalyptic number.

It is an amenable number.

51538044 is an abundant number, since it is smaller than the sum of its proper divisors (68717420).

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

51538044 is a wasteful number, since it uses less digits than its factorization.

51538044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4294844 (or 4294842 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 51538044 is about 7179.0002089427. Note that the first 3 decimals coincide. The cubic root of 51538044 is about 372.1425341188.

The spelling of 51538044 in words is "fifty-one million, five hundred thirty-eight thousand, forty-four".