1552400279 has 2 divisors, whose sum is σ = 1552400280. Its totient is φ = 1552400278.

The previous prime is 1552400221. The next prime is 1552400281. The reversal of 1552400279 is 9720042551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1552400279 - 2⁸ = 1552400023 is a prime.

Together with 1552400281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1552400219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776200139 + 776200140.

It is an arithmetic number, because the mean of its divisors is an integer number (776200140).

Almost surely, 2^1552400279 is an apocalyptic number.

1552400279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1552400279 is an equidigital number, since it uses as much as digits as its factorization.

1552400279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 1552400279 is about 39400.5111515067. The cubic root of 1552400279 is about 1157.8916019076.

The spelling of 1552400279 in words is "one billion, five hundred fifty-two million, four hundred thousand, two hundred seventy-nine".