421051631 has 64 divisors (see below), whose sum is σ = 606735360. Its totient is φ = 281180160.

The previous prime is 421051627. The next prime is 421051661. The reversal of 421051631 is 136150124.

It is a cyclic number.

It is not a de Polignac number, because 421051631 - 2² = 421051627 is a prime.

It is a super-2 number, since 2×421051631² = 354568951935520322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421051597 and 421051606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421051621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1854740 + ... + 1854966.

It is an arithmetic number, because the mean of its divisors is an integer number (9480240).

Almost surely, 2^421051631 is an apocalyptic number.

421051631 is a deficient number, since it is larger than the sum of its proper divisors (185683729).

421051631 is a wasteful number, since it uses less digits than its factorization.

421051631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 421051631 is about 20519.5426605955. The cubic root of 421051631 is about 749.5117598607.

The spelling of 421051631 in words is "four hundred twenty-one million, fifty-one thousand, six hundred thirty-one".