201025778 has 8 divisors (see below), whose sum is σ = 301632768. Its totient is φ = 100481524.

The previous prime is 201025763. The next prime is 201025801. The reversal of 201025778 is 877520102.

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

It is a super-2 number, since 2×201025778² = 80822726841010568, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6626 + ... + 21117.

It is an arithmetic number, because the mean of its divisors is an integer number (37704096).

Almost surely, 2^201025778 is an apocalyptic number.

201025778 is a deficient number, since it is larger than the sum of its proper divisors (100606990).

201025778 is a wasteful number, since it uses less digits than its factorization.

201025778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31368.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 201025778 is about 14178.3559695756. The cubic root of 201025778 is about 585.8016409014.

The spelling of 201025778 in words is "two hundred one million, twenty-five thousand, seven hundred seventy-eight".