201521154151 has 4 divisors (see below), whose sum is σ = 203059483704. Its totient is φ = 199982824600.

The previous prime is 201521154113. The next prime is 201521154217. The reversal of 201521154151 is 151451125102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201521154151 - 2¹⁵ = 201521121383 is a prime.

It is a super-2 number, since 2×201521154151² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201521154451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769164580 + ... + 769164841.

It is an arithmetic number, because the mean of its divisors is an integer number (50764870926).

Almost surely, 2^201521154151 is an apocalyptic number.

201521154151 is a deficient number, since it is larger than the sum of its proper divisors (1538329553).

201521154151 is a wasteful number, since it uses less digits than its factorization.

201521154151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538329552.

The product of its (nonzero) digits is 2000, while the sum is 28.

Adding to 201521154151 its reverse (151451125102), we get a palindrome (352972279253).

The spelling of 201521154151 in words is "two hundred one billion, five hundred twenty-one million, one hundred fifty-four thousand, one hundred fifty-one".