2251561110 has 32 divisors (see below), whose sum is σ = 5415351552. Its totient is φ = 599126880.

The previous prime is 2251561087. The next prime is 2251561121. The reversal of 2251561110 is 111651522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66346 + ... + 94365.

It is an arithmetic number, because the mean of its divisors is an integer number (169229736).

Almost surely, 2^2251561110 is an apocalyptic number.

2251561110 is an abundant number, since it is smaller than the sum of its proper divisors (3163790442).

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

2251561110 is a wasteful number, since it uses less digits than its factorization.

2251561110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161188.

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 2251561110 is about 47450.6175934518. The cubic root of 2251561110 is about 1310.6736837528.

The spelling of 2251561110 in words is "two billion, two hundred fifty-one million, five hundred sixty-one thousand, one hundred ten".