51150020 has 12 divisors (see below), whose sum is σ = 107415084. Its totient is φ = 20460000.

The previous prime is 51150017. The next prime is 51150023. The reversal of 51150020 is 2005115.

It is an interprime number because it is at equal distance from previous prime (51150017) and next prime (51150023).

It can be written as a sum of positive squares in 2 ways, for example, as 11182336 + 39967684 = 3344^2 + 6322^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51149977 and 51150004.

It is not an unprimeable number, because it can be changed into a prime (51150023) 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, 1278731 + ... + 1278770.

It is an arithmetic number, because the mean of its divisors is an integer number (8951257).

Almost surely, 2^51150020 is an apocalyptic number.

It is an amenable number.

51150020 is an abundant number, since it is smaller than the sum of its proper divisors (56265064).

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

51150020 is a wasteful number, since it uses less digits than its factorization.

51150020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2557510 (or 2557508 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 51150020 is about 7151.9242166007. The cubic root of 51150020 is about 371.2062409926.

Adding to 51150020 its reverse (2005115), we get a palindrome (53155135).

The spelling of 51150020 in words is "fifty-one million, one hundred fifty thousand, twenty".