201521051270 has 32 divisors (see below), whose sum is σ = 452244646656. Its totient is φ = 62811756000.

The previous prime is 201521051219. The next prime is 201521051293. The reversal of 201521051270 is 72150125102.

It is a super-2 number, since 2×201521051270² (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 15 ways as a sum of consecutive naturals, for example, 130857056 + ... + 130858595.

It is an arithmetic number, because the mean of its divisors is an integer number (14132645208).

Almost surely, 2^201521051270 is an apocalyptic number.

201521051270 is an abundant number, since it is smaller than the sum of its proper divisors (250723595386).

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

201521051270 is a wasteful number, since it uses less digits than its factorization.

201521051270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261715676.

The product of its (nonzero) digits is 1400, while the sum is 26.

Adding to 201521051270 its reverse (72150125102), we get a palindrome (273671176372).

The spelling of 201521051270 in words is "two hundred one billion, five hundred twenty-one million, fifty-one thousand, two hundred seventy".