51030340 has 24 divisors (see below), whose sum is σ = 110621952. Its totient is φ = 19753440.

The previous prime is 51030337. The next prime is 51030341. The reversal of 51030340 is 4303015.

It is not an unprimeable number, because it can be changed into a prime (51030341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40534 + ... + 41773.

It is an arithmetic number, because the mean of its divisors is an integer number (4609248).

Almost surely, 2^51030340 is an apocalyptic number.

It is an amenable number.

51030340 is an abundant number, since it is smaller than the sum of its proper divisors (59591612).

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

51030340 is a wasteful number, since it uses less digits than its factorization.

51030340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82347 (or 82345 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 51030340 is about 7143.5523375979. The cubic root of 51030340 is about 370.9165007534.

Adding to 51030340 its reverse (4303015), we get a palindrome (55333355).

The spelling of 51030340 in words is "fifty-one million, thirty thousand, three hundred forty".