2520621481 has 8 divisors (see below), whose sum is σ = 2921284224. Its totient is φ = 2130102240.

The previous prime is 2520621469. The next prime is 2520621487. The reversal of 2520621481 is 1841260252.

2520621481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2520621481 - 2⁷ = 2520621353 is a prime.

It is a super-2 number, since 2×2520621481² = 12707065300957266722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520621487) 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, 2535340 + ... + 2536333.

It is an arithmetic number, because the mean of its divisors is an integer number (365160528).

Almost surely, 2^2520621481 is an apocalyptic number.

It is an amenable number.

2520621481 is a deficient number, since it is larger than the sum of its proper divisors (400662743).

2520621481 is an equidigital number, since it uses as much as digits as its factorization.

2520621481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071751.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 2520621481 is about 50205.7913093699. The cubic root of 2520621481 is about 1360.9302820902.

The spelling of 2520621481 in words is "two billion, five hundred twenty million, six hundred twenty-one thousand, four hundred eighty-one".