1552455551 has 4 divisors (see below), whose sum is σ = 1577905704. Its totient is φ = 1527005400.

The previous prime is 1552455539. The next prime is 1552455557. The reversal of 1552455551 is 1555542551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1552455551 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 (1552455557) 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, 12724985 + ... + 12725106.

It is an arithmetic number, because the mean of its divisors is an integer number (394476426).

Almost surely, 2^1552455551 is an apocalyptic number.

1552455551 is a deficient number, since it is larger than the sum of its proper divisors (25450153).

1552455551 is an equidigital number, since it uses as much as digits as its factorization.

1552455551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25450152.

The product of its digits is 125000, while the sum is 38.

The square root of 1552455551 is about 39401.2125574836. The cubic root of 1552455551 is about 1157.9053436867.

The spelling of 1552455551 in words is "one billion, five hundred fifty-two million, four hundred fifty-five thousand, five hundred fifty-one".