51619225 has 24 divisors (see below), whose sum is σ = 77459328. Its totient is φ = 33312000.

The previous prime is 51619223. The next prime is 51619241. The reversal of 51619225 is 52291615.

51619225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51619225 - 2¹ = 51619223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51619223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5701 + ... + 11650.

It is an arithmetic number, because the mean of its divisors is an integer number (3227472).

Almost surely, 2^51619225 is an apocalyptic number.

It is an amenable number.

51619225 is a deficient number, since it is larger than the sum of its proper divisors (25840103).

51619225 is a wasteful number, since it uses less digits than its factorization.

51619225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17385 (or 17380 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The square root of 51619225 is about 7184.6520444626. The cubic root of 51619225 is about 372.3378270984.

The spelling of 51619225 in words is "fifty-one million, six hundred nineteen thousand, two hundred twenty-five".