1541222251 has 4 divisors (see below), whose sum is σ = 1544701752. Its totient is φ = 1537742752.

The previous prime is 1541222231. The next prime is 1541222273. The reversal of 1541222251 is 1522221451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1522221451 = 761 ⋅2000291.

It is a cyclic number.

It is not a de Polignac number, because 1541222251 - 2⁵ = 1541222219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1541222201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1739086 + ... + 1739971.

It is an arithmetic number, because the mean of its divisors is an integer number (386175438).

Almost surely, 2^1541222251 is an apocalyptic number.

1541222251 is a deficient number, since it is larger than the sum of its proper divisors (3479501).

1541222251 is an equidigital number, since it uses as much as digits as its factorization.

1541222251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479500.

The product of its digits is 1600, while the sum is 25.

The square root of 1541222251 is about 39258.4035717195. The cubic root of 1541222251 is about 1155.1057794339.

The spelling of 1541222251 in words is "one billion, five hundred forty-one million, two hundred twenty-two thousand, two hundred fifty-one".