4001551542 has 12 divisors (see below), whose sum is σ = 8670028380. Its totient is φ = 1333850508.

The previous prime is 4001551531. The next prime is 4001551571. The reversal of 4001551542 is 2451551004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111154192 + ... + 111154227.

It is an arithmetic number, because the mean of its divisors is an integer number (722502365).

Almost surely, 2^4001551542 is an apocalyptic number.

4001551542 is an abundant number, since it is smaller than the sum of its proper divisors (4668476838).

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

4001551542 is a wasteful number, since it uses less digits than its factorization.

4001551542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222308427 (or 222308424 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 4001551542 is about 63257.8180306593. The cubic root of 4001551542 is about 1587.6062687205.

The spelling of 4001551542 in words is "four billion, one million, five hundred fifty-one thousand, five hundred forty-two".