3125315551 has 4 divisors (see below), whose sum is σ = 3197997352. Its totient is φ = 3052633752.

The previous prime is 3125315549. The next prime is 3125315579. The reversal of 3125315551 is 1555135213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1555135213 = 1847 ⋅841979.

It is a cyclic number.

It is not a de Polignac number, because 3125315551 - 2¹ = 3125315549 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 (3125315521) 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, 36340836 + ... + 36340921.

It is an arithmetic number, because the mean of its divisors is an integer number (799499338).

Almost surely, 2^3125315551 is an apocalyptic number.

3125315551 is a deficient number, since it is larger than the sum of its proper divisors (72681801).

3125315551 is an equidigital number, since it uses as much as digits as its factorization.

3125315551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72681800.

The product of its digits is 11250, while the sum is 31.

The square root of 3125315551 is about 55904.5217401956. The cubic root of 3125315551 is about 1462.0580768753.

The spelling of 3125315551 in words is "three billion, one hundred twenty-five million, three hundred fifteen thousand, five hundred fifty-one".