2151051623 has 4 divisors (see below), whose sum is σ = 2458344720. Its totient is φ = 1843758528.

The previous prime is 2151051619. The next prime is 2151051703. The reversal of 2151051623 is 3261501512.

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

It is a cyclic number.

It is not a de Polignac number, because 2151051623 - 2² = 2151051619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151051592 and 2151051601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151051613) 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, 153646538 + ... + 153646551.

It is an arithmetic number, because the mean of its divisors is an integer number (614586180).

Almost surely, 2^2151051623 is an apocalyptic number.

2151051623 is a deficient number, since it is larger than the sum of its proper divisors (307293097).

2151051623 is an equidigital number, since it uses as much as digits as its factorization.

2151051623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307293096.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 2151051623 is about 46379.4310335951. The cubic root of 2151051623 is about 1290.8732790515.

The spelling of 2151051623 in words is "two billion, one hundred fifty-one million, fifty-one thousand, six hundred twenty-three".