2451221542 has 32 divisors (see below), whose sum is σ = 4601608704. Its totient is φ = 951374400.

The previous prime is 2451221519. The next prime is 2451221543.

It is a happy number.

2451221542 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 2451221542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2451221543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10242 + ... + 70762.

It is an arithmetic number, because the mean of its divisors is an integer number (143800272).

Almost surely, 2^2451221542 is an apocalyptic number.

2451221542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2451221542 is a deficient number, since it is larger than the sum of its proper divisors (2150387162).

2451221542 is a wasteful number, since it uses less digits than its factorization.

2451221542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60804.

The product of its digits is 6400, while the sum is 28.

The square root of 2451221542 is about 49509.8125829618. The cubic root of 2451221542 is about 1348.3237617050.

The spelling of 2451221542 in words is "two billion, four hundred fifty-one million, two hundred twenty-one thousand, five hundred forty-two".