201025890 has 96 divisors (see below), whose sum is σ = 592562880. Its totient is φ = 46873728.

The previous prime is 201025861. The next prime is 201025897. The reversal of 201025890 is 98520102.

It is a super-2 number, since 2×201025890² = 80822816900584200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201025897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17709 + ... + 26751.

It is an arithmetic number, because the mean of its divisors is an integer number (6172530).

Almost surely, 2^201025890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201025890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296281440).

201025890 is an abundant number, since it is smaller than the sum of its proper divisors (391536990).

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

201025890 is a wasteful number, since it uses less digits than its factorization.

201025890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9088 (or 9085 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 201025890 is about 14178.3599192572. The cubic root of 201025890 is about 585.8017496931.

Adding to 201025890 its reverse (98520102), we get a palindrome (299545992).

The spelling of 201025890 in words is "two hundred one million, twenty-five thousand, eight hundred ninety".