1631292421 has 8 divisors (see below), whose sum is σ = 1780216704. Its totient is φ = 1482472320.

The previous prime is 1631292413. The next prime is 1631292433. The reversal of 1631292421 is 1242921361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1631292421 - 2³ = 1631292413 is a prime.

It is a super-2 number, since 2×1631292421² = 5322229925624082482, which 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 (1631292401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8725 + ... + 57781.

It is an arithmetic number, because the mean of its divisors is an integer number (222527088).

Almost surely, 2^1631292421 is an apocalyptic number.

1631292421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1631292421 is a deficient number, since it is larger than the sum of its proper divisors (148924283).

1631292421 is a wasteful number, since it uses less digits than its factorization.

1631292421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52091.

The product of its digits is 5184, while the sum is 31.

The square root of 1631292421 is about 40389.2612088907. The cubic root of 1631292421 is about 1177.1828855317.

The spelling of 1631292421 in words is "one billion, six hundred thirty-one million, two hundred ninety-two thousand, four hundred twenty-one".