201430501 has 4 divisors (see below), whose sum is σ = 213279372. Its totient is φ = 189581632.

The previous prime is 201430477. The next prime is 201430511. The reversal of 201430501 is 105034102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105034102 = 2 ⋅52517051.

It can be written as a sum of positive squares in 2 ways, for example, as 147039876 + 54390625 = 12126^2 + 7375^2 .

It is a cyclic number.

It is not a de Polignac number, because 201430501 - 2⁷ = 201430373 is a prime.

It is a super-2 number, since 2×201430501² = 81148493466222002, which 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 (201430511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5924410 + ... + 5924443.

It is an arithmetic number, because the mean of its divisors is an integer number (53319843).

Almost surely, 2^201430501 is an apocalyptic number.

It is an amenable number.

201430501 is a deficient number, since it is larger than the sum of its proper divisors (11848871).

201430501 is a wasteful number, since it uses less digits than its factorization.

201430501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11848870.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 201430501 is about 14192.6213575928. The cubic root of 201430501 is about 586.1945067138.

Adding to 201430501 its reverse (105034102), we get a palindrome (306464603).

The spelling of 201430501 in words is "two hundred one million, four hundred thirty thousand, five hundred one".