1011431213 has 8 divisors (see below), whose sum is σ = 1090224408. Its totient is φ = 932779584.

The previous prime is 1011431207. The next prime is 1011431257. The reversal of 1011431213 is 3121341101.

It can be written as a sum of positive squares in 4 ways, for example, as 48135844 + 963295369 = 6938^2 + 31037^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011431213 - 2¹² = 1011427117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011431191 and 1011431200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011431413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20306 + ... + 49347.

It is an arithmetic number, because the mean of its divisors is an integer number (136278051).

Almost surely, 2^1011431213 is an apocalyptic number.

1011431213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1011431213 is a deficient number, since it is larger than the sum of its proper divisors (78793195).

1011431213 is a wasteful number, since it uses less digits than its factorization.

1011431213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70783.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1011431213 is about 31803.0063516014. The cubic root of 1011431213 is about 1003.7959766619.

Adding to 1011431213 its reverse (3121341101), we get a palindrome (4132772314).

The spelling of 1011431213 in words is "one billion, eleven million, four hundred thirty-one thousand, two hundred thirteen".