1551404051 has 2 divisors, whose sum is σ = 1551404052. Its totient is φ = 1551404050.

The previous prime is 1551404011. The next prime is 1551404077. The reversal of 1551404051 is 1504041551.

It is an a-pointer prime, because the next prime (1551404077) can be obtained adding 1551404051 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1551404051 - 2¹⁴ = 1551387667 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1551404051.

It is not a weakly prime, because it can be changed into another prime (1551404011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775702025 + 775702026.

It is an arithmetic number, because the mean of its divisors is an integer number (775702026).

Almost surely, 2^1551404051 is an apocalyptic number.

1551404051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551404051 is an equidigital number, since it uses as much as digits as its factorization.

1551404051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1551404051 is about 39387.8667993076. The cubic root of 1551404051 is about 1157.6438627795.

The spelling of 1551404051 in words is "one billion, five hundred fifty-one million, four hundred four thousand, fifty-one".