51450145 has 16 divisors (see below), whose sum is σ = 64228032. Its totient is φ = 39533760.

The previous prime is 51450131. The next prime is 51450167. The reversal of 51450145 is 54105415.

It is a happy number.

It is not a de Polignac number, because 51450145 - 2²¹ = 49352993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11154 + ... + 15076.

It is an arithmetic number, because the mean of its divisors is an integer number (4014252).

Almost surely, 2^51450145 is an apocalyptic number.

It is an amenable number.

51450145 is a deficient number, since it is larger than the sum of its proper divisors (12777887).

51450145 is a wasteful number, since it uses less digits than its factorization.

51450145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4032.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 51450145 is about 7172.8756437011. The cubic root of 51450145 is about 371.9308486138.

The spelling of 51450145 in words is "fifty-one million, four hundred fifty thousand, one hundred forty-five".