201297947400 has 432 divisors, whose sum is σ = 744618747600. Its totient is φ = 48697862400.

The previous prime is 201297947317. The next prime is 201297947401. The reversal of 201297947400 is 4749792102.

It is a happy number.

201297947400 is a `hidden beast` number, since 201 + 297 + 94 + 74 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (201297947401) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 197544091 + ... + 197545109.

Almost surely, 2^201297947400 is an apocalyptic number.

201297947400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201297947400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (372309373800).

201297947400 is an abundant number, since it is smaller than the sum of its proper divisors (543320800200).

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

201297947400 is a wasteful number, since it uses less digits than its factorization.

201297947400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970 (or 1947 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 201297947400 in words is "two hundred one billion, two hundred ninety-seven million, nine hundred forty-seven thousand, four hundred".