51345225 has 96 divisors (see below), whose sum is σ = 101481600. Its totient is φ = 25401600.

The previous prime is 51345199. The next prime is 51345241. The reversal of 51345225 is 52254315.

It is a happy number.

51345225 is a `hidden beast` number, since 5 + 134 + 522 + 5 = 666.

It is not a de Polignac number, because 51345225 - 2⁷ = 51345097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 841695 + ... + 841755.

It is an arithmetic number, because the mean of its divisors is an integer number (1057100).

Almost surely, 2^51345225 is an apocalyptic number.

It is an amenable number.

51345225 is a deficient number, since it is larger than the sum of its proper divisors (50136375).

51345225 is a wasteful number, since it uses less digits than its factorization.

51345225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 141 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 51345225 is about 7165.5582476176. The cubic root of 51345225 is about 371.6778558660.

The spelling of 51345225 in words is "fifty-one million, three hundred forty-five thousand, two hundred twenty-five".