51145407 has 12 divisors (see below), whose sum is σ = 74265984. Its totient is φ = 33917280.

The previous prime is 51145403. The next prime is 51145417. The reversal of 51145407 is 70454115.

It is a happy number.

51145407 is a `hidden beast` number, since 5 + 114 + 540 + 7 = 666.

It is not a de Polignac number, because 51145407 - 2² = 51145403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145403) 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, 13158 + ... + 16595.

It is an arithmetic number, because the mean of its divisors is an integer number (6188832).

Almost surely, 2^51145407 is an apocalyptic number.

51145407 is a deficient number, since it is larger than the sum of its proper divisors (23120577).

51145407 is a wasteful number, since it uses less digits than its factorization.

51145407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29950 (or 29947 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 51145407 is about 7151.6017087083. The cubic root of 51145407 is about 371.1950814931.

The spelling of 51145407 in words is "fifty-one million, one hundred forty-five thousand, four hundred seven".