1911248531 has 2 divisors, whose sum is σ = 1911248532. Its totient is φ = 1911248530.

The previous prime is 1911248461. The next prime is 1911248557. The reversal of 1911248531 is 1358421191.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1358421191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1911248531 - 2¹⁸ = 1910986387 is a prime.

It is a super-2 number, since 2×1911248531² = 7305741894499315922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1911248491 and 1911248500.

It is not a weakly prime, because it can be changed into another prime (1911208531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 955624265 + 955624266.

It is an arithmetic number, because the mean of its divisors is an integer number (955624266).

Almost surely, 2^1911248531 is an apocalyptic number.

1911248531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1911248531 is an equidigital number, since it uses as much as digits as its factorization.

1911248531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 1911248531 is about 43717.8285256713. The cubic root of 1911248531 is about 1241.0017336726.

The spelling of 1911248531 in words is "one billion, nine hundred eleven million, two hundred forty-eight thousand, five hundred thirty-one".