201553730 has 32 divisors (see below), whose sum is σ = 420315264. Its totient is φ = 68155776.

The previous prime is 201553721. The next prime is 201553739. The reversal of 201553730 is 37355102.

It is an interprime number because it is at equal distance from previous prime (201553721) and next prime (201553739).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 201553730.

It is not an unprimeable number, because it can be changed into a prime (201553739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14612 + ... + 24831.

It is an arithmetic number, because the mean of its divisors is an integer number (13134852).

Almost surely, 2^201553730 is an apocalyptic number.

201553730 is an abundant number, since it is smaller than the sum of its proper divisors (218761534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201553730 is a wasteful number, since it uses less digits than its factorization.

201553730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39530.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 201553730 is about 14196.9619989630. The cubic root of 201553730 is about 586.3140209497.

The spelling of 201553730 in words is "two hundred one million, five hundred fifty-three thousand, seven hundred thirty".