1313021031 has 16 divisors (see below), whose sum is σ = 2020222464. Its totient is φ = 743012064.

The previous prime is 1313020949. The next prime is 1313021051. The reversal of 1313021031 is 1301203131.

It is not a de Polignac number, because 1313021031 - 2¹³ = 1313012839 is a prime.

It is a super-2 number, since 2×1313021031² = 3448048455696605922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1313021031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313021051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301356 + ... + 305681.

It is an arithmetic number, because the mean of its divisors is an integer number (126263904).

Almost surely, 2^1313021031 is an apocalyptic number.

1313021031 is a deficient number, since it is larger than the sum of its proper divisors (707201433).

1313021031 is a wasteful number, since it uses less digits than its factorization.

1313021031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607150.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1313021031 is about 36235.6320629294. The cubic root of 1313021031 is about 1095.0246461374.

Adding to 1313021031 its reverse (1301203131), we get a palindrome (2614224162).

The spelling of 1313021031 in words is "one billion, three hundred thirteen million, twenty-one thousand, thirty-one".