51125146 has 8 divisors (see below), whose sum is σ = 76750740. Its totient is φ = 25541568.

The previous prime is 51125131. The next prime is 51125149. The reversal of 51125146 is 64152115.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44422225 + 6702921 = 6665^2 + 2589^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51125146² = 5227561107042632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51125146.

It is not an unprimeable number, because it can be changed into a prime (51125149) 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, 7261 + ... + 12448.

Almost surely, 2^51125146 is an apocalyptic number.

51125146 is a deficient number, since it is larger than the sum of its proper divisors (25625594).

51125146 is a wasteful number, since it uses less digits than its factorization.

51125146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21008.

The product of its digits is 1200, while the sum is 25.

The square root of 51125146 is about 7150.1850325708. The cubic root of 51125146 is about 371.1460593207.

The spelling of 51125146 in words is "fifty-one million, one hundred twenty-five thousand, one hundred forty-six".