100320731 has 8 divisors (see below), whose sum is σ = 114757344. Its totient is φ = 85910400.

The previous prime is 100320707. The next prime is 100320749. The reversal of 100320731 is 137023001.

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 100320731 - 2¹⁰ = 100319707 is a prime.

It is a super-2 number, since 2×100320731² = 20128498136748722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100322731) 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, 2441 + ... + 14373.

It is an arithmetic number, because the mean of its divisors is an integer number (14344668).

Almost surely, 2^100320731 is an apocalyptic number.

100320731 is a deficient number, since it is larger than the sum of its proper divisors (14436613).

100320731 is a wasteful number, since it uses less digits than its factorization.

100320731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13141.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 100320731 is about 10016.0237120326. The cubic root of 100320731 is about 464.6545875887.

Adding to 100320731 its reverse (137023001), we get a palindrome (237343732).

The spelling of 100320731 in words is "one hundred million, three hundred twenty thousand, seven hundred thirty-one".