55503151 has 4 divisors (see below), whose sum is σ = 60548904. Its totient is φ = 50457400.

The previous prime is 55503143. The next prime is 55503157. The reversal of 55503151 is 15130555.

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 55503151 - 2³ = 55503143 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 (55503157) 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, 2522860 + ... + 2522881.

It is an arithmetic number, because the mean of its divisors is an integer number (15137226).

Almost surely, 2^55503151 is an apocalyptic number.

55503151 is a deficient number, since it is larger than the sum of its proper divisors (5045753).

55503151 is a wasteful number, since it uses less digits than its factorization.

55503151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045752.

The product of its (nonzero) digits is 1875, while the sum is 25.

The square root of 55503151 is about 7450.0436911471. The cubic root of 55503151 is about 381.4513999585.

The spelling of 55503151 in words is "fifty-five million, five hundred three thousand, one hundred fifty-one".