1020351631 has 8 divisors (see below), whose sum is σ = 1136731680. Its totient is φ = 909384672.

The previous prime is 1020351617. The next prime is 1020351637. The reversal of 1020351631 is 1361530201.

It is a happy number.

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 1020351631 - 2¹⁷ = 1020220559 is a prime.

It is a super-2 number, since 2×1020351631² = 2082234901768720322, 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 (1020351637) 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, 1352875 + ... + 1353628.

It is an arithmetic number, because the mean of its divisors is an integer number (142091460).

Almost surely, 2^1020351631 is an apocalyptic number.

1020351631 is a deficient number, since it is larger than the sum of its proper divisors (116380049).

1020351631 is a wasteful number, since it uses less digits than its factorization.

1020351631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706545.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1020351631 is about 31942.9433678238. The cubic root of 1020351631 is about 1006.7383693913.

Adding to 1020351631 its reverse (1361530201), we get a palindrome (2381881832).

The spelling of 1020351631 in words is "one billion, twenty million, three hundred fifty-one thousand, six hundred thirty-one".