51640330 has 16 divisors (see below), whose sum is σ = 106231680. Its totient is φ = 17705232.

The previous prime is 51640297. The next prime is 51640363. The reversal of 51640330 is 3304615.

It is an interprime number because it is at equal distance from previous prime (51640297) and next prime (51640363).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368790 + ... + 368929.

It is an arithmetic number, because the mean of its divisors is an integer number (6639480).

Almost surely, 2^51640330 is an apocalyptic number.

51640330 is an abundant number, since it is smaller than the sum of its proper divisors (54591350).

51640330 is a wasteful number, since it uses less digits than its factorization.

51640330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737733.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 51640330 is about 7186.1206502535. The cubic root of 51640330 is about 372.3885647781.

Adding to 51640330 its reverse (3304615), we get a palindrome (54944945).

The spelling of 51640330 in words is "fifty-one million, six hundred forty thousand, three hundred thirty".