1551000019 has 2 divisors, whose sum is σ = 1551000020. Its totient is φ = 1551000018.

The previous prime is 1550999987. The next prime is 1551000037. The reversal of 1551000019 is 9100001551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1551000019 - 2⁵ = 1550999987 is a prime.

It is a super-2 number, since 2×1551000019² = 4811202117876000722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1551000089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775500009 + 775500010.

It is an arithmetic number, because the mean of its divisors is an integer number (775500010).

Almost surely, 2^1551000019 is an apocalyptic number.

1551000019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551000019 is an equidigital number, since it uses as much as digits as its factorization.

1551000019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 1551000019 is about 39382.7375762529. The cubic root of 1551000019 is about 1157.5433590296.

The spelling of 1551000019 in words is "one billion, five hundred fifty-one million, nineteen", and thus it is an aban number.