1011145631 has 8 divisors (see below), whose sum is σ = 1051276800. Its totient is φ = 971484120.

The previous prime is 1011145621. The next prime is 1011145633. The reversal of 1011145631 is 1365411101.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011145631 is a prime.

It is a super-2 number, since 2×1011145631² = 2044830974180776322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011145597 and 1011145606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011145633) 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, 113021 + ... + 121638.

It is an arithmetic number, because the mean of its divisors is an integer number (131409600).

Almost surely, 2^1011145631 is an apocalyptic number.

1011145631 is a deficient number, since it is larger than the sum of its proper divisors (40131169).

1011145631 is a wasteful number, since it uses less digits than its factorization.

1011145631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234829.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1011145631 is about 31798.5161760734. The cubic root of 1011145631 is about 1003.7014923827.

Adding to 1011145631 its reverse (1365411101), we get a palindrome (2376556732).

The spelling of 1011145631 in words is "one billion, eleven million, one hundred forty-five thousand, six hundred thirty-one".