51545830 has 16 divisors (see below), whose sum is σ = 106037280. Its totient is φ = 17672832.

The previous prime is 51545827. The next prime is 51545831. The reversal of 51545830 is 3854515.

It is a junction number, because it is equal to n+sod(n) for n = 51545792 and 51545801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51545831) 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, 368115 + ... + 368254.

It is an arithmetic number, because the mean of its divisors is an integer number (6627330).

Almost surely, 2^51545830 is an apocalyptic number.

51545830 is an abundant number, since it is smaller than the sum of its proper divisors (54491450).

51545830 is a wasteful number, since it uses less digits than its factorization.

51545830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736383.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 51545830 is about 7179.5424645307. The cubic root of 51545830 is about 372.1612733882.

The spelling of 51545830 in words is "fifty-one million, five hundred forty-five thousand, eight hundred thirty".