100601615 has 4 divisors (see below), whose sum is σ = 120721944. Its totient is φ = 80481288.

The previous prime is 100601591. The next prime is 100601617. The reversal of 100601615 is 516106001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100601615 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100601617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10060157 + ... + 10060166.

It is an arithmetic number, because the mean of its divisors is an integer number (30180486).

Almost surely, 2^100601615 is an apocalyptic number.

100601615 is a deficient number, since it is larger than the sum of its proper divisors (20120329).

100601615 is an equidigital number, since it uses as much as digits as its factorization.

100601615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20120328.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 100601615 is about 10030.0356430075. The cubic root of 100601615 is about 465.0878394201.

Adding to 100601615 its reverse (516106001), we get a palindrome (616707616).

The spelling of 100601615 in words is "one hundred million, six hundred one thousand, six hundred fifteen".