51333345 has 80 divisors (see below), whose sum is σ = 110816640. Its totient is φ = 22208256.

The previous prime is 51333329. The next prime is 51333367. The reversal of 51333345 is 54333315.

It is a happy number.

It is not a de Polignac number, because 51333345 - 2⁴ = 51333329 is a prime.

It is a super-2 number, since 2×51333345² = 5270224617778050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 53389 + ... + 54341.

It is an arithmetic number, because the mean of its divisors is an integer number (1385208).

Almost surely, 2^51333345 is an apocalyptic number.

It is an amenable number.

51333345 is an abundant number, since it is smaller than the sum of its proper divisors (59483295).

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

51333345 is a wasteful number, since it uses less digits than its factorization.

51333345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996 (or 987 counting only the distinct ones).

The product of its digits is 8100, while the sum is 27.

The square root of 51333345 is about 7164.7292342419. The cubic root of 51333345 is about 371.6491880037.

The spelling of 51333345 in words is "fifty-one million, three hundred thirty-three thousand, three hundred forty-five".