2345020521 has 16 divisors (see below), whose sum is σ = 3212603904. Its totient is φ = 1520429184.

The previous prime is 2345020481. The next prime is 2345020547. The reversal of 2345020521 is 1250205432.

It is not a de Polignac number, because 2345020521 - 2⁷ = 2345020393 is a prime.

It is a super-2 number, since 2×2345020521² = 10998242487822222882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2345020491 and 2345020500.

It is not an unprimeable number, because it can be changed into a prime (2345020921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 458440 + ... + 463526.

It is an arithmetic number, because the mean of its divisors is an integer number (200787744).

Almost surely, 2^2345020521 is an apocalyptic number.

It is an amenable number.

2345020521 is a deficient number, since it is larger than the sum of its proper divisors (867583383).

2345020521 is a wasteful number, since it uses less digits than its factorization.

2345020521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9280.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 2345020521 is about 48425.4119342314. The cubic root of 2345020521 is about 1328.5631912361.

Adding to 2345020521 its reverse (1250205432), we get a palindrome (3595225953).

The spelling of 2345020521 in words is "two billion, three hundred forty-five million, twenty thousand, five hundred twenty-one".