201451505501 has 8 divisors (see below), whose sum is σ = 201673646400. Its totient is φ = 201229469280.

The previous prime is 201451505449. The next prime is 201451505509. The reversal of 201451505501 is 105505154102.

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 201451505501 - 2²⁶ = 201384396637 is a prime.

It is a super-2 number, since 2×201451505501² (a number of 23 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 (201451505509) 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, 4192430 + ... + 4240208.

It is an arithmetic number, because the mean of its divisors is an integer number (25209205800).

Almost surely, 2^201451505501 is an apocalyptic number.

It is an amenable number.

201451505501 is a deficient number, since it is larger than the sum of its proper divisors (222140899).

201451505501 is a wasteful number, since it uses less digits than its factorization.

201451505501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52339.

The product of its (nonzero) digits is 5000, while the sum is 29.

Adding to 201451505501 its reverse (105505154102), we get a palindrome (306956659603).

The spelling of 201451505501 in words is "two hundred one billion, four hundred fifty-one million, five hundred five thousand, five hundred one".