2151554103 has 8 divisors (see below), whose sum is σ = 3187487600. Its totient is φ = 1434369384.

The previous prime is 2151554099. The next prime is 2151554123. The reversal of 2151554103 is 3014551512.

2151554103 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 554 + 103 = 666.

It is not a de Polignac number, because 2151554103 - 2² = 2151554099 is a prime.

It is a super-2 number, since 2×2151554103² = 9258370116272269218, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 79687189 = 2151554103 / (2 + 1 + 5 + 1 + 5 + 5 + 4 + 1 + 0 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151554123) 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, 39843568 + ... + 39843621.

It is an arithmetic number, because the mean of its divisors is an integer number (398435950).

Almost surely, 2^2151554103 is an apocalyptic number.

2151554103 is a deficient number, since it is larger than the sum of its proper divisors (1035933497).

2151554103 is an equidigital number, since it uses as much as digits as its factorization.

2151554103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79687198 (or 79687192 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 2151554103 is about 46384.8477738151. The cubic root of 2151554103 is about 1290.9737860932.

The spelling of 2151554103 in words is "two billion, one hundred fifty-one million, five hundred fifty-four thousand, one hundred three".