51019137 has 12 divisors (see below), whose sum is σ = 79363284. Its totient is φ = 31396320.

The previous prime is 51019081. The next prime is 51019151. The reversal of 51019137 is 73191015.

It is a happy number.

51019137 is a `hidden beast` number, since 510 + 19 + 137 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17564481 + 33454656 = 4191^2 + 5784^2 .

It is not a de Polignac number, because 51019137 - 2⁸ = 51018881 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51019137.

It is not an unprimeable number, because it can be changed into a prime (51019637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217914 + ... + 218147.

It is an arithmetic number, because the mean of its divisors is an integer number (6613607).

Almost surely, 2^51019137 is an apocalyptic number.

It is an amenable number.

51019137 is a deficient number, since it is larger than the sum of its proper divisors (28344147).

51019137 is a wasteful number, since it uses less digits than its factorization.

51019137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436080 (or 436077 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 27.

The square root of 51019137 is about 7142.7681608743. The cubic root of 51019137 is about 370.8893555840.

The spelling of 51019137 in words is "fifty-one million, nineteen thousand, one hundred thirty-seven".