51255432305 has 16 divisors (see below), whose sum is σ = 76683452544. Its totient is φ = 31951438080.

The previous prime is 51255432301. The next prime is 51255432313. The reversal of 51255432305 is 50323455215.

It is not a de Polignac number, because 51255432305 - 2² = 51255432301 is a prime.

It is a super-2 number, since 2×51255432305² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51255432301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66565112 + ... + 66565881.

It is an arithmetic number, because the mean of its divisors is an integer number (4792715784).

Almost surely, 2^51255432305 is an apocalyptic number.

51255432305 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51255432305 is a deficient number, since it is larger than the sum of its proper divisors (25428020239).

51255432305 is a wasteful number, since it uses less digits than its factorization.

51255432305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133131016.

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 51255432305 in words is "fifty-one billion, two hundred fifty-five million, four hundred thirty-two thousand, three hundred five".