2154342540 has 96 divisors (see below), whose sum is σ = 7062096384. Its totient is φ = 480407040.

The previous prime is 2154342523. The next prime is 2154342559. The reversal of 2154342540 is 452434512.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2154342498 and 2154342507.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45334 + ... + 79773.

It is an arithmetic number, because the mean of its divisors is an integer number (73563504).

Almost surely, 2^2154342540 is an apocalyptic number.

2154342540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154342540 is an abundant number, since it is smaller than the sum of its proper divisors (4907753844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154342540 is a wasteful number, since it uses less digits than its factorization.

2154342540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125167 (or 125165 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 2154342540 is about 46414.8956693861. The cubic root of 2154342540 is about 1291.5312505881.

The spelling of 2154342540 in words is "two billion, one hundred fifty-four million, three hundred forty-two thousand, five hundred forty".