42151521213 has 24 divisors (see below), whose sum is σ = 62189295480. Its totient is φ = 27501926400.

The previous prime is 42151521193. The next prime is 42151521229. The reversal of 42151521213 is 31212515124.

It is a happy number.

42151521213 is a `hidden beast` number, since 4 + 21 + 515 + 2 + 121 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19277378649 + 22874142564 = 138843^2 + 151242^2 .

It is not a de Polignac number, because 42151521213 - 2⁶ = 42151521149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42151521253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81093 + ... + 301461.

It is an arithmetic number, because the mean of its divisors is an integer number (2591220645).

Almost surely, 2^42151521213 is an apocalyptic number.

It is an amenable number.

42151521213 is a deficient number, since it is larger than the sum of its proper divisors (20037774267).

42151521213 is a wasteful number, since it uses less digits than its factorization.

42151521213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220829 (or 220826 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The spelling of 42151521213 in words is "forty-two billion, one hundred fifty-one million, five hundred twenty-one thousand, two hundred thirteen".