201424251 has 24 divisors (see below), whose sum is σ = 313045824. Its totient is φ = 114866640.

The previous prime is 201424229. The next prime is 201424253. The reversal of 201424251 is 152424102.

It is not a de Polignac number, because 201424251 - 2⁵ = 201424219 is a prime.

It is a super-2 number, since 2×201424251² = 81143457781822002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (201424253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93456 + ... + 95586.

It is an arithmetic number, because the mean of its divisors is an integer number (13043576).

Almost surely, 2^201424251 is an apocalyptic number.

201424251 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201424251 is a deficient number, since it is larger than the sum of its proper divisors (111621573).

201424251 is a wasteful number, since it uses less digits than its factorization.

201424251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2791 (or 2784 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 201424251 is about 14192.4011710492. The cubic root of 201424251 is about 586.1884438227.

Adding to 201424251 its reverse (152424102), we get a palindrome (353848353).

The spelling of 201424251 in words is "two hundred one million, four hundred twenty-four thousand, two hundred fifty-one".