201521154106 has 16 divisors (see below), whose sum is σ = 312735168000. Its totient is φ = 97276763248.

The previous prime is 201521154071. The next prime is 201521154113. The reversal of 201521154106 is 601451125102.

It is a super-2 number, since 2×201521154106² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465471 + ... + 787213.

It is an arithmetic number, because the mean of its divisors is an integer number (19545948000).

Almost surely, 2^201521154106 is an apocalyptic number.

201521154106 is a deficient number, since it is larger than the sum of its proper divisors (111214013894).

201521154106 is a wasteful number, since it uses less digits than its factorization.

201521154106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332573.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 201521154106 its reverse (601451125102), we get a palindrome (802972279208).

The spelling of 201521154106 in words is "two hundred one billion, five hundred twenty-one million, one hundred fifty-four thousand, one hundred six".