1551040499 has 4 divisors (see below), whose sum is σ = 1551356136. Its totient is φ = 1550724864.

The previous prime is 1551040483. The next prime is 1551040501. The reversal of 1551040499 is 9940401551.

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

It is a cyclic number.

It is not a de Polignac number, because 1551040499 - 2⁴ = 1551040483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551010499) 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, 150329 + ... + 160314.

It is an arithmetic number, because the mean of its divisors is an integer number (387839034).

Almost surely, 2^1551040499 is an apocalyptic number.

1551040499 is a deficient number, since it is larger than the sum of its proper divisors (315637).

1551040499 is an equidigital number, since it uses as much as digits as its factorization.

1551040499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315636.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 1551040499 is about 39383.2515036532. The cubic root of 1551040499 is about 1157.5534292955.

The spelling of 1551040499 in words is "one billion, five hundred fifty-one million, forty thousand, four hundred ninety-nine".