2100431554 has 8 divisors (see below), whose sum is σ = 3393004860. Its totient is φ = 969429936.

The previous prime is 2100431491. The next prime is 2100431561. The reversal of 2100431554 is 4551340012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2018075929 + 82355625 = 44923^2 + 9075^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40392889 + ... + 40392940.

Almost surely, 2^2100431554 is an apocalyptic number.

2100431554 is a deficient number, since it is larger than the sum of its proper divisors (1292573306).

2100431554 is a wasteful number, since it uses less digits than its factorization.

2100431554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80785844.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2100431554 is about 45830.4653478448. The cubic root of 2100431554 is about 1280.6668794651. Note that the first 3 decimals are identical.

Adding to 2100431554 its reverse (4551340012), we get a palindrome (6651771566).

The spelling of 2100431554 in words is "two billion, one hundred million, four hundred thirty-one thousand, five hundred fifty-four".