2351015440 has 80 divisors (see below), whose sum is σ = 5623233840. Its totient is φ = 913571840.

The previous prime is 2351015437. The next prime is 2351015467. The reversal of 2351015440 is 445101532.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4194304 + 2346821136 = 2048^2 + 48444^2 .

It is a tau number, because it is divible by the number of its divisors (80).

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, 841566 + ... + 844354.

It is an arithmetic number, because the mean of its divisors is an integer number (70290423).

Almost surely, 2^2351015440 is an apocalyptic number.

2351015440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2351015440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2811616920).

2351015440 is an abundant number, since it is smaller than the sum of its proper divisors (3272218400).

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

2351015440 is a wasteful number, since it uses less digits than its factorization.

2351015440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100 (or 3094 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2351015440 is about 48487.2709069092. The cubic root of 2351015440 is about 1329.6943613362.

Adding to 2351015440 its reverse (445101532), we get a palindrome (2796116972).

The spelling of 2351015440 in words is "two billion, three hundred fifty-one million, fifteen thousand, four hundred forty".