2100155401 has 8 divisors (see below), whose sum is σ = 2256884640. Its totient is φ = 1947114048.

The previous prime is 2100155383. The next prime is 2100155411. The reversal of 2100155401 is 1045510012.

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 2100155401 - 2⁷ = 2100155273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100155411) 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, 920791 + ... + 923068.

It is an arithmetic number, because the mean of its divisors is an integer number (282110580).

Almost surely, 2^2100155401 is an apocalyptic number.

It is an amenable number.

2100155401 is a deficient number, since it is larger than the sum of its proper divisors (156729239).

2100155401 is a wasteful number, since it uses less digits than its factorization.

2100155401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843943.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 2100155401 is about 45827.4524821095. The cubic root of 2100155401 is about 1280.6107520310.

Adding to 2100155401 its reverse (1045510012), we get a palindrome (3145665413).

The spelling of 2100155401 in words is "two billion, one hundred million, one hundred fifty-five thousand, four hundred one".