1031521413 has 24 divisors (see below), whose sum is σ = 1503832512. Its totient is φ = 628587648.

The previous prime is 1031521349. The next prime is 1031521433. The reversal of 1031521413 is 3141251301.

It is not a de Polignac number, because 1031521413 - 2⁶ = 1031521349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1031521413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031521433) 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 23 ways as a sum of consecutive naturals, for example, 42345 + ... + 62097.

It is an arithmetic number, because the mean of its divisors is an integer number (62659688).

Almost surely, 2^1031521413 is an apocalyptic number.

1031521413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1031521413 is a deficient number, since it is larger than the sum of its proper divisors (472311099).

1031521413 is a wasteful number, since it uses less digits than its factorization.

1031521413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19885 (or 19872 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1031521413 is about 32117.3070633265. The cubic root of 1031521413 is about 1010.3986313266.

Adding to 1031521413 its reverse (3141251301), we get a palindrome (4172772714).

The spelling of 1031521413 in words is "one billion, thirty-one million, five hundred twenty-one thousand, four hundred thirteen".