1020031357 has 2 divisors, whose sum is σ = 1020031358. Its totient is φ = 1020031356.

The previous prime is 1020031303. The next prime is 1020031379. The reversal of 1020031357 is 7531300201.

It is an a-pointer prime, because the next prime (1020031379) can be obtained adding 1020031357 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1019780356 + 251001 = 31934^2 + 501^2 .

It is an emirp because it is prime and its reverse (7531300201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020031357 - 2²⁷ = 885813629 is a prime.

It is a super-2 number, since 2×1020031357² = 2080927938526522898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020031457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510015678 + 510015679.

It is an arithmetic number, because the mean of its divisors is an integer number (510015679).

Almost surely, 2^1020031357 is an apocalyptic number.

It is an amenable number.

1020031357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020031357 is an equidigital number, since it uses as much as digits as its factorization.

1020031357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 1020031357 is about 31937.9297544471. The cubic root of 1020031357 is about 1006.6330247055.

Adding to 1020031357 its reverse (7531300201), we get a palindrome (8551331558).

The spelling of 1020031357 in words is "one billion, twenty million, thirty-one thousand, three hundred fifty-seven".