31030032491 has 2 divisors, whose sum is σ = 31030032492. Its totient is φ = 31030032490.

The previous prime is 31030032443. The next prime is 31030032497. The reversal of 31030032491 is 19423003013.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31030032491 - 2³⁴ = 13850163307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31030032491.

It is not a weakly prime, because it can be changed into another prime (31030032497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15515016245 + 15515016246.

It is an arithmetic number, because the mean of its divisors is an integer number (15515016246).

Almost surely, 2^31030032491 is an apocalyptic number.

31030032491 is a deficient number, since it is larger than the sum of its proper divisors (1).

31030032491 is an equidigital number, since it uses as much as digits as its factorization.

31030032491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 31030032491 in words is "thirty-one billion, thirty million, thirty-two thousand, four hundred ninety-one".