2145642550 has 12 divisors (see below), whose sum is σ = 3990895236. Its totient is φ = 858257000.

The previous prime is 2145642533. The next prime is 2145642563. The reversal of 2145642550 is 552465412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21456376 + ... + 21456475.

It is an arithmetic number, because the mean of its divisors is an integer number (332574603).

Almost surely, 2^2145642550 is an apocalyptic number.

2145642550 is a deficient number, since it is larger than the sum of its proper divisors (1845252686).

2145642550 is a wasteful number, since it uses less digits than its factorization.

2145642550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42912863 (or 42912858 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 2145642550 is about 46321.0810538787. The cubic root of 2145642550 is about 1289.7903531270.

The spelling of 2145642550 in words is "two billion, one hundred forty-five million, six hundred forty-two thousand, five hundred fifty".