1000013531 has 8 divisors (see below), whose sum is σ = 1126115328. Its totient is φ = 879777000.

The previous prime is 1000013519. The next prime is 1000013537. The reversal of 1000013531 is 1353100001.

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-1000013531 is a prime.

It is a super-2 number, since 2×1000013531² = 2000054124366175922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000013537) 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, 1465955 + ... + 1466636.

It is an arithmetic number, because the mean of its divisors is an integer number (140764416).

Almost surely, 2^1000013531 is an apocalyptic number.

1000013531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1000013531 is a deficient number, since it is larger than the sum of its proper divisors (126101797).

1000013531 is a wasteful number, since it uses less digits than its factorization.

1000013531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932633.

The product of its (nonzero) digits is 45, while the sum is 14.

The square root of 1000013531 is about 31622.9905448552. The cubic root of 1000013531 is about 1000.0045103130.

Adding to 1000013531 its reverse (1353100001), we get a palindrome (2353113532).

The spelling of 1000013531 in words is "one billion, thirteen thousand, five hundred thirty-one".