51125538 has 32 divisors (see below), whose sum is σ = 106140672. Its totient is φ = 16405200.

The previous prime is 51125537. The next prime is 51125539. The reversal of 51125538 is 83552115.

It is an interprime number because it is at equal distance from previous prime (51125537) and next prime (51125539).

It is a super-2 number, since 2×51125538² = 5227641271578888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51125533) 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, 16923 + ... + 19713.

It is an arithmetic number, because the mean of its divisors is an integer number (3316896).

Almost surely, 2^51125538 is an apocalyptic number.

51125538 is an abundant number, since it is smaller than the sum of its proper divisors (55015134).

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

51125538 is a wasteful number, since it uses less digits than its factorization.

51125538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910.

The product of its digits is 6000, while the sum is 30.

The square root of 51125538 is about 7150.2124443963. The cubic root of 51125538 is about 371.1470079008.

The spelling of 51125538 in words is "fifty-one million, one hundred twenty-five thousand, five hundred thirty-eight".