201055531 has 2 divisors, whose sum is σ = 201055532. Its totient is φ = 201055530.

The previous prime is 201055523. The next prime is 201055541. The reversal of 201055531 is 135550102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201055531 - 2³ = 201055523 is a prime.

It is a super-2 number, since 2×201055531² = 80846653091383922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201055501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100527765 + 100527766.

It is an arithmetic number, because the mean of its divisors is an integer number (100527766).

Almost surely, 2^201055531 is an apocalyptic number.

201055531 is a deficient number, since it is larger than the sum of its proper divisors (1).

201055531 is an equidigital number, since it uses as much as digits as its factorization.

201055531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 201055531 is about 14179.4051708808. The cubic root of 201055531 is about 585.8305401742.

The spelling of 201055531 in words is "two hundred one million, fifty-five thousand, five hundred thirty-one".