51225001 has 4 divisors (see below), whose sum is σ = 51243604. Its totient is φ = 51206400.

The previous prime is 51224963. The next prime is 51225023. The reversal of 51225001 is 10052215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39501225 + 11723776 = 6285^2 + 3424^2 .

It is a cyclic number.

It is not a de Polignac number, because 51225001 - 2⁹ = 51224489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51225701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4260 + ... + 10981.

It is an arithmetic number, because the mean of its divisors is an integer number (12810901).

Almost surely, 2^51225001 is an apocalyptic number.

It is an amenable number.

51225001 is a deficient number, since it is larger than the sum of its proper divisors (18603).

51225001 is a wasteful number, since it uses less digits than its factorization.

51225001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18602.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 51225001 is about 7157.1643127708. The cubic root of 51225001 is about 371.3875366262.

Adding to 51225001 its reverse (10052215), we get a palindrome (61277216).

The spelling of 51225001 in words is "fifty-one million, two hundred twenty-five thousand, one".