1533731 has 2 divisors, whose sum is σ = 1533732. Its totient is φ = 1533730.

The previous prime is 1533713. The next prime is 1533743. The reversal of 1533731 is 1373351.

It is a happy number.

Together with previous prime (1533713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1533731 is a prime.

It is a super-2 number, since 2×1533731² = 4704661560722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1533697 and 1533706.

It is not a weakly prime, because it can be changed into another prime (1533331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 766865 + 766866.

It is an arithmetic number, because the mean of its divisors is an integer number (766866).

2^1533731 is an apocalyptic number.

1533731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1533731 is an equidigital number, since it uses as much as digits as its factorization.

1533731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 945, while the sum is 23.

The square root of 1533731 is about 1238.4389367264. The cubic root of 1533731 is about 115.3231240104.

The spelling of 1533731 in words is "one million, five hundred thirty-three thousand, seven hundred thirty-one".