201521046 has 16 divisors (see below), whose sum is σ = 403190208. Its totient is φ = 67149000.

The previous prime is 201521041. The next prime is 201521051. The reversal of 201521046 is 640125102.

201521046 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (201521041) and next prime (201521051).

It is a super-2 number, since 2×201521046² = 81221463961868232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201521041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20161 + ... + 28451.

It is an arithmetic number, because the mean of its divisors is an integer number (25199388).

Almost surely, 2^201521046 is an apocalyptic number.

201521046 is an abundant number, since it is smaller than the sum of its proper divisors (201669162).

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

201521046 is a wasteful number, since it uses less digits than its factorization.

201521046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12347.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 201521046 is about 14195.8108609547. The cubic root of 201521046 is about 586.2823269636.

Adding to 201521046 its reverse (640125102), we get a palindrome (841646148).

The spelling of 201521046 in words is "two hundred one million, five hundred twenty-one thousand, forty-six".