1251355223305 has 48 divisors (see below), whose sum is σ = 1714621716864. Its totient is φ = 875372960000.

The previous prime is 1251355223267. The next prime is 1251355223333. The reversal of 1251355223305 is 5033225531521.

It is not a de Polignac number, because 1251355223305 - 2¹¹ = 1251355221257 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1405890 + ... + 2116420.

It is an arithmetic number, because the mean of its divisors is an integer number (35721285768).

Almost surely, 2^{1251355223305} is an apocalyptic number.

It is an amenable number.

1251355223305 is a deficient number, since it is larger than the sum of its proper divisors (463266493559).

1251355223305 is a wasteful number, since it uses less digits than its factorization.

1251355223305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710670 (or 710659 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 37.

The spelling of 1251355223305 in words is "one trillion, two hundred fifty-one billion, three hundred fifty-five million, two hundred twenty-three thousand, three hundred five".