2291554840 has 32 divisors (see below), whose sum is σ = 5159088000. Its totient is φ = 916072704.

The previous prime is 2291554819. The next prime is 2291554841. The reversal of 2291554840 is 484551922.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2291554793 and 2291554802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291554841) 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, 54076 + ... + 86644.

It is an arithmetic number, because the mean of its divisors is an integer number (161221500).

Almost surely, 2^2291554840 is an apocalyptic number.

2291554840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2291554840 is an abundant number, since it is smaller than the sum of its proper divisors (2867533160).

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

2291554840 is a wasteful number, since it uses less digits than its factorization.

2291554840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34339 (or 34335 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 2291554840 is about 47870.1873821275. The cubic root of 2291554840 is about 1318.3885370381.

The spelling of 2291554840 in words is "two billion, two hundred ninety-one million, five hundred fifty-four thousand, eight hundred forty".