201551432 has 16 divisors (see below), whose sum is σ = 388123260. Its totient is φ = 98051904.

The previous prime is 201551431. The next prime is 201551443. The reversal of 201551432 is 234155102.

It can be written as a sum of positive squares in 2 ways, for example, as 201469636 + 81796 = 14194^2 + 286^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201551398 and 201551407.

It is not an unprimeable number, because it can be changed into a prime (201551431) 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 3 ways as a sum of consecutive naturals, for example, 340163 + ... + 340754.

Almost surely, 2^201551432 is an apocalyptic number.

It is an amenable number.

201551432 is a deficient number, since it is larger than the sum of its proper divisors (186571828).

201551432 is a wasteful number, since it uses less digits than its factorization.

201551432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680960 (or 680956 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 201551432 is about 14196.8810659243. The cubic root of 201551432 is about 586.3117926692.

The spelling of 201551432 in words is "two hundred one million, five hundred fifty-one thousand, four hundred thirty-two".