1001945531 has 2 divisors, whose sum is σ = 1001945532. Its totient is φ = 1001945530.

The previous prime is 1001945491. The next prime is 1001945543. The reversal of 1001945531 is 1355491001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001945531 - 2¹⁰ = 1001944507 is a prime.

It is a super-2 number, since 2×1001945531² = 2007789694181743922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001945494 and 1001945503.

It is not a weakly prime, because it can be changed into another prime (1001945561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500972765 + 500972766.

It is an arithmetic number, because the mean of its divisors is an integer number (500972766).

Almost surely, 2^1001945531 is an apocalyptic number.

1001945531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001945531 is an equidigital number, since it uses as much as digits as its factorization.

1001945531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 1001945531 is about 31653.5232004275. The cubic root of 1001945531 is about 1000.6480902217.

The spelling of 1001945531 in words is "one billion, one million, nine hundred forty-five thousand, five hundred thirty-one".