2251165555501 has 8 divisors (see below), whose sum is σ = 2306947233344. Its totient is φ = 2196036295200.

The previous prime is 2251165555487. The next prime is 2251165555511. The reversal of 2251165555501 is 1055555611522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2251165555501 - 2²³ = 2251157166893 is a prime.

It is a super-2 number, since 2×2251165555501² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251165555511) 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, 163097400 + ... + 163111201.

It is an arithmetic number, because the mean of its divisors is an integer number (288368404168).

Almost surely, 2^{2251165555501} is an apocalyptic number.

It is an amenable number.

2251165555501 is a deficient number, since it is larger than the sum of its proper divisors (55781677843).

2251165555501 is a wasteful number, since it uses less digits than its factorization.

2251165555501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326208771.

The product of its (nonzero) digits is 375000, while the sum is 43.

The spelling of 2251165555501 in words is "two trillion, two hundred fifty-one billion, one hundred sixty-five million, five hundred fifty-five thousand, five hundred one".