201534256550 has 48 divisors (see below), whose sum is σ = 422122696704. Its totient is φ = 70921140000.

The previous prime is 201534256537. The next prime is 201534256571. The reversal of 201534256550 is 55652435102.

It is a super-2 number, since 2×201534256550² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5893046 + ... + 5927145.

It is an arithmetic number, because the mean of its divisors is an integer number (8794222848).

Almost surely, 2^201534256550 is an apocalyptic number.

201534256550 is an abundant number, since it is smaller than the sum of its proper divisors (220588440154).

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

201534256550 is a wasteful number, since it uses less digits than its factorization.

201534256550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11820245 (or 11820240 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 201534256550 in words is "two hundred one billion, five hundred thirty-four million, two hundred fifty-six thousand, five hundred fifty".