201606431 has 8 divisors (see below), whose sum is σ = 226554720. Its totient is φ = 178006752.

The previous prime is 201606409. The next prime is 201606437. The reversal of 201606431 is 134606102.

It is a happy number.

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

It is not a de Polignac number, because 201606431 - 2⁶ = 201606367 is a prime.

It is a super-2 number, since 2×201606431² = 81290306041115522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201606397 and 201606406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201606437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336836 + ... + 337433.

It is an arithmetic number, because the mean of its divisors is an integer number (28319340).

Almost surely, 2^201606431 is an apocalyptic number.

201606431 is a deficient number, since it is larger than the sum of its proper divisors (24948289).

201606431 is a wasteful number, since it uses less digits than its factorization.

201606431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674305.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 201606431 is about 14198.8179437586. The cubic root of 201606431 is about 586.3651183957.

The spelling of 201606431 in words is "two hundred one million, six hundred six thousand, four hundred thirty-one".