1552041391 has 4 divisors (see below), whose sum is σ = 1633727800. Its totient is φ = 1470354984.

The previous prime is 1552041371. The next prime is 1552041409. The reversal of 1552041391 is 1931402551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1931402551 = 13 ⋅148569427.

It is a cyclic number.

It is not a de Polignac number, because 1552041391 - 2¹³ = 1552033199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1552041371) 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, 40843176 + ... + 40843213.

It is an arithmetic number, because the mean of its divisors is an integer number (408431950).

Almost surely, 2^1552041391 is an apocalyptic number.

1552041391 is a deficient number, since it is larger than the sum of its proper divisors (81686409).

1552041391 is an equidigital number, since it uses as much as digits as its factorization.

1552041391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81686408.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1552041391 is about 39395.9565310959. The cubic root of 1552041391 is about 1157.8023668836.

The spelling of 1552041391 in words is "one billion, five hundred fifty-two million, forty-one thousand, three hundred ninety-one".