51230040 has 32 divisors (see below), whose sum is σ = 153690480. Its totient is φ = 13661312.

The previous prime is 51230029. The next prime is 51230063. The reversal of 51230040 is 4003215.

51230040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213339 + ... + 213578.

Almost surely, 2^51230040 is an apocalyptic number.

It is an amenable number.

51230040 is an abundant number, since it is smaller than the sum of its proper divisors (102460440).

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

51230040 is a wasteful number, since it uses less digits than its factorization.

51230040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426931 (or 426927 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 51230040 is about 7157.5163290069. The cubic root of 51230040 is about 371.3997140161.

Adding to 51230040 its reverse (4003215), we get a palindrome (55233255).

The spelling of 51230040 in words is "fifty-one million, two hundred thirty thousand, forty".