51532305 has 64 divisors (see below), whose sum is σ = 96657408. Its totient is φ = 23189760.

The previous prime is 51532301. The next prime is 51532331. The reversal of 51532305 is 50323515.

It is not a de Polignac number, because 51532305 - 2² = 51532301 is a prime.

It is a super-2 number, since 2×51532305² = 5311156917226050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51532301) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 140232 + ... + 140598.

It is an arithmetic number, because the mean of its divisors is an integer number (1510272).

Almost surely, 2^51532305 is an apocalyptic number.

51532305 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51532305 is a deficient number, since it is larger than the sum of its proper divisors (45125103).

51532305 is a wasteful number, since it uses less digits than its factorization.

51532305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 51532305 is about 7178.6004903463. The cubic root of 51532305 is about 372.1287203409.

The spelling of 51532305 in words is "fifty-one million, five hundred thirty-two thousand, three hundred five".