51225370 has 32 divisors (see below), whose sum is σ = 109963008. Its totient is φ = 16798848.

The previous prime is 51225331. The next prime is 51225371. The reversal of 51225370 is 7352215.

It is not an unprimeable number, because it can be changed into a prime (51225371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14299 + ... + 17518.

It is an arithmetic number, because the mean of its divisors is an integer number (3436344).

Almost surely, 2^51225370 is an apocalyptic number.

51225370 is an abundant number, since it is smaller than the sum of its proper divisors (58737638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51225370 is a wasteful number, since it uses less digits than its factorization.

51225370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31854.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 51225370 is about 7157.1900910902. The cubic root of 51225370 is about 371.3884283891.

Adding to 51225370 its reverse (7352215), we get a palindrome (58577585).

The spelling of 51225370 in words is "fifty-one million, two hundred twenty-five thousand, three hundred seventy".