201257631 has 12 divisors (see below), whose sum is σ = 291030480. Its totient is φ = 134021760.

The previous prime is 201257629. The next prime is 201257657. The reversal of 201257631 is 136752102.

It is a happy number.

201257631 is a `hidden beast` number, since 2 + 0 + 1 + 25 + 7 + 631 = 666.

It is not a de Polignac number, because 201257631 - 2¹ = 201257629 is a prime.

It is a super-2 number, since 2×201257631² = 81009268071464322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201257595 and 201257604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201257621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3675 + ... + 20396.

It is an arithmetic number, because the mean of its divisors is an integer number (24252540).

Almost surely, 2^201257631 is an apocalyptic number.

201257631 is a deficient number, since it is larger than the sum of its proper divisors (89772849).

201257631 is a wasteful number, since it uses less digits than its factorization.

201257631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25006 (or 25003 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 201257631 is about 14186.5299139712. The cubic root of 201257631 is about 586.0267657365.

The spelling of 201257631 in words is "two hundred one million, two hundred fifty-seven thousand, six hundred thirty-one".