1555000901 has 2 divisors, whose sum is σ = 1555000902. Its totient is φ = 1555000900.

The previous prime is 1555000883. The next prime is 1555000919. The reversal of 1555000901 is 1090005551.

It is a balanced prime because it is at equal distance from previous prime (1555000883) and next prime (1555000919).

It can be written as a sum of positive squares in only one way, i.e., 1538992900 + 16008001 = 39230^2 + 4001^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555000901 - 2²² = 1550806597 is a prime.

It is a super-2 number, since 2×1555000901² = 4836055604221623602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1555000921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777500450 + 777500451.

It is an arithmetic number, because the mean of its divisors is an integer number (777500451).

Almost surely, 2^1555000901 is an apocalyptic number.

It is an amenable number.

1555000901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555000901 is an equidigital number, since it uses as much as digits as its factorization.

1555000901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1125, while the sum is 26.

The square root of 1555000901 is about 39433.4997305590. The cubic root of 1555000901 is about 1158.5378180662.

The spelling of 1555000901 in words is "one billion, five hundred fifty-five million, nine hundred one", and thus it is an aban number.