7520453821 has 8 divisors (see below), whose sum is σ = 8050442400. Its totient is φ = 7003882800.

The previous prime is 7520453813. The next prime is 7520453827. The reversal of 7520453821 is 1283540257.

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

It is a cyclic number.

It is not a de Polignac number, because 7520453821 - 2³ = 7520453813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7520453827) 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, 3353230 + ... + 3355471.

It is an arithmetic number, because the mean of its divisors is an integer number (1006305300).

Almost surely, 2^7520453821 is an apocalyptic number.

It is an amenable number.

7520453821 is a deficient number, since it is larger than the sum of its proper divisors (529988579).

7520453821 is a wasteful number, since it uses less digits than its factorization.

7520453821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6708779.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 7520453821 is about 86720.5501654596. The cubic root of 7520453821 is about 1959.2116276975.

The spelling of 7520453821 in words is "seven billion, five hundred twenty million, four hundred fifty-three thousand, eight hundred twenty-one".